Add a bare-bones README

[Newbytee]

Only contains information about dependencies necessary for building on Linux. I wouldn't say that this does what's necessary for #28 to be closed as it doesn't really explain what the library is for.

[xloem]

@xvitaly @ilya-fedin what do you think of this PR? We could add the protobuf version to it from #43 (comment) .

[ilya-fedin]

I think there should be information about that this is a fork of https://github.com/open-webrtc-toolkit/owt-deps-webrtc that is a fork of https://webrtc.github.io/webrtc-org/native-code/ with changes only for cmake build and all contributions and issues about the code should go to https://github.com/open-webrtc-toolkit/owt-deps-webrtc/issues https://github.com/open-webrtc-toolkit/owt-deps-webrtc/pulls or to https://webrtc.github.io/webrtc-org/bugs/ https://webrtc.github.io/webrtc-org/contributing/ either, while tg_owt issues and PRs are only about problems with cmake files.

Probably it's also worth to mention that the only "officially" supported target for Linux is x86_64 static build, while shared build and support for all other architectures is community maintained and may break from time to time due to any needed changes until someone interested fix it.

[ilya-fedin]

@Newbytee will you continue to work on this or the PR can be closed?

[Newbytee]

@Newbytee will you continue to work on this or the PR can be closed?

I had forgotten about this PR. I could address the complaints, but I would like some indication from Preston that he would merge this should they be addressed as right now he hasn't involved himself the slightest.

[ilya-fedin]

What if we document building tdesktop in DESKTOP_APP_USE_PACKAGED mode with all its dependencies instead of documenting here? tg_owt build process really depends on how you build the app consuming it (special target, internal audio backends and etc).

[ilya-fedin]

Finally, I documented my packaged building mode in tdesktop wiki
https://github.com/telegramdesktop/tdesktop/wiki/The-Packaged-Building-Mode

Feel free to close the PR if this info is enough.

[Newbytee]

Looks good to me 👍. I still find it a bit odd that this repo doesn't explain itself, but at least it's explained there now to someone building Telegram themselves.