Version 1.0 - New cassette format, filtering and ignoring

BACKWARDS INCOMPATIBLE: Please see the 'upgrade' section in the README.

Add support for filtering sensitive data from requests, matching query strings after the order changes and improving the built-in matchers, (thanks to @mshytikov), support for ignoring requests to certain hosts, bump supported Python3 version to 3.4, fix some bugs with Boto support (thanks @marusich), fix error with URL field capitalization in README (thanks @simon-weber), added some log messages to help with debugging, added all_played property on cassette (thanks @mshytikov)