v0.6.0 release

Changelog:

• Added attrib original_text in VideoTile elements to save the unedited text before ellison overwrites it forever.
• Tuned all the pixel size, ellison and max size values to work with the new VideoTime system.
• Made all the new max size and ellison settings configurable.
• Fixed ellison inconsistency and mismatch issues by creating a function get_unicode_weight which calculates a
  "width-weight" for unicode characters, and then that weight is subtracted from the ellison modifier.
• Changed VideoTile sizing logic to use a maximum size instead of fixed size, which fixed the issue with QLabel text
  going OOB.
• Added debug tile coloring for padding debug.
• Made channel title and date text pixel size configurable
• Made title text weight configurable (Normal, DemiBold, Bold).
• Merged configurable database type and location into one single option 'url'.
• Fixed bug where timestamp wouldn't show the correct level, due to accidentally being offset by 1.
• Made config inform about which options require restart. Also: rearranged some options.
• Fixed broken thumbnail tooltip feature.
• Moved get_default_player from playback to super (VideoTile).
• Cleaned up keyboard modifiers code a bit.
• Fixed bad function signatures.
• Made player an optional kwarg in open_in_player()
• Refactored some strings.
• Deprecated and deleted config_play_video function.
• Made Subfeed context menu options on par with Playback's (alt players etc, mark watched, play w/o mark watched, etc...).
• Fixed buggy implementation of mousePressEvent in Subfeed that listened to all mouse events, not just LeftButton (whoops!).
• Added Playback's MidButton decrease_prio/mark_downloaded functionality to Subfeed.
• Created a function open_in_browser that properly opens a url in the web browser.
• Added some pydoc here and there.
• Made open_in_player compatible with being served URLs as well as file paths.
• Deprecated and deleted 'use_url_as_path' config hotfix.
• Added "restart may be required" signifier to config options w/o bindings.
• Fixed bug where timedelta years weren't subtracted by 10 when showing decades.
• Made youtube-dl an optional dependency, and removed tqdm entirely.
• Added in stock BreezeStyleSheets and made them load instead of the windows modded ones if you're on Linux. Also added
  a missing README.md.
• Added toolbar icon size modifier for use on High DPI displays.
• Implemented actions and kwargs bindings in GenericLineEdit.
• Tweaked Elided text modifier for video title to perfection (if text is bolded or otherwise it will cut off a little
  sooner than this perfection, but that's why it's been made user configurable).
• Explicitly set progress bars to blue instead of assuming it would be the default (varies with QStyle and QPalette).
• Fixed issue #5 (Launched players would quit along with Sane) by pre-pending 'nohup' to Popen arguments (if Linux).
• Changed timedelta formatting delimiter from % to $ due to shortcomings in ConfigParser (%% is an escaped percent sign,
  so config parser finds it, but it doesn't actually do anything, but % isn't a valid string interpolation. so it fails.
• Made video uploaded timedelta format customisable, and changed to use relativedelta with a string.Template to have
  strftime-esque formatting (it only allows for [a-z], so had to go with repeating letters instead of dash.
• Made GridView elided text values customisable.
• Fixed GridView text bleeding out of frame (length-wise, height cut-off issue is still unresolved).
• Made elided title text modifier customisable and moved out of place 'title pixel size' item in ConfigView.
• Removed mysterious hide_downloaded setting from GUI config (and MainWindowListener) that seemingly did nothing.
• Fixed bug where despawned Central Widgets were not respawning properly, leading it segfaults.
• Config checkboxes now support multiple functions where some don't have kwargs.
• Toggle for playback and download feature and debug mode now toggles the menubar and toolbar items as well.
• Created function to respawn menubar and toolbar in MainWindow (useful when config has changed to reflect hiding items)
• Extended GenericConfigCheckBox's function(**kwargs) capability to include lists of functions (and/or lists of kwargs).
• Added functionality for tabs to be inserted at their predetermined position instead of at end of row, and made it the
  default.
• Made Debug tab in ConfigView spawn and despawn when enable Debug option is checked/unchecked.
• Made Download tab in ConfigView spawn and despawn when enable PlaybackView option is checked/unchecked.
• Implemented ability for GenericConfigCheckBox to take checked/unchecked action functions and kwargs.
• Split ConfigView's populate_options into one function per tab, which allows for more fine grained adding/populating
  in future.
• Moved settings for enabling debug mode and GUI to a new "Advanced" tab in ConfigView.
• Made "Download" tab not show on startup if Playback view is disabled.
• Created del_tab and add_tab (and refactored add_tabs accordingly) in ConfigViewTabs.
• Moved Views to their own "Views" tab in ConfigView.
• Removed obsolete tab_id kwarg from InputSuper (ConfigView).
• Mask database location from being written to generated sample config.
• Made Database type and location customisable from config (default type: sqlite).
• Sample configuration files are now generated if none already exist.
• Fixed issue with log-to-file feature spawning a new file handler instance for each create_logger() call
  (3000+ file descriptors).
• Made Left mouse button action remappable (a little stop-gap pending full implementation of hotkeys, default: open in
  default web browser)
• Made Playback view (and implicitly downloading features) optional (default: disabled).
• Fixed bug that prevented QtWidget styles in Window->Theme->Style from working at all.
• Made DownloadView able to retry/re-add failed downloads.
• Made video download logic able to emit failed download signals to DownloadView and set info accordingly.
• Made downloader properly report and set failed download status to failed on pesky SSL Handshake errors (Errno 0).
• Updated MainWindow's confirmation_dialog function to make all args but message and action optional.
• Removed debug logging for unfinished downloads when clear finished downloads button is pressed.
• Made config text input fields actually set the the text variable to current config instead of just showing a
  placeholder while text variable was Null (could potentially have lead to issues down the line)
• Made config text input fields save-as-you-type instead of unintuitively requiring user to hit the return key.
• Added config option to adjust thumbnail tile overlay width and height
  (NB: If you have enabled force AR width won't change)
• Fixed bug where SaneInputDialog didn't auto close after OK was clicked.
• Added startup choice between build API key and oauth from string or load from file
• Updated startup checks to send in a cancel_action instead of needing to carry around (and update) two boolean
  variables for whether or not public files were used.
• Made it possible to bind actions to cancel button on SaneConfirmationDialog
• Implemented an init_ui() in SaneDialog, giving it new purpose.
• Made essential Sane{Confirmation,}Dialog args normal instead of kwarg