Add a CHANGELOG document that keeps track of the past and current
release notes.
Making all of our releases rely on GitHub to keep track of them is not
really a good idea, so this document serves as a record of past release
changelogs just as a pre-caution. It also allows a live preview of the
next version whenever something is changed.
Bundle our custom ExoPlayer components into aar instead of directly
depending on the project. This just makes things far better regarding
ease of use and reproducible builds.
Expose a custom MediaButtonReceiver that handles the media button
intent. This is not because I wanted to implement this. Some apps
like gadgetbridge just blindly query ACTION_MEDIA_BUTTON instead of
relying on the more modern MediaController API, which I expected
most apps would use instead.
Resolves#62.
