Merge pull request #15 from google/dev

Merge 1.0.11 to master
Merge pull request #16 from google/dev

Add missing files.
Merge branch 'dev' of persistent-https://github.com/google/ExoPlayer into dev
Finish painful bytes/sec -> bits/sec conversion.
Fix integer variant of library version.
Make DefaultWebmExtractor handle cues and format independently.

* Remove concept of being prepared by simply reporting if format
and/or cues are known.
* Allow replacement of format and/or cues later in the stream.
* Initialization and index segments can be parsed independently
of one another but must be in order due to internal WebM dependencies.
* Let seekTo() work even when cues are unknown.
Don't call doSomeWork if we're preparing
Add CacheDataSource.Listener.
Changes around renderer readiness and extraction.

- Make MediaCodecTrackRenderer.isReady more permissive.
  This largely fixes #21
- Bring WebmExtractor closer to FragmentedMp4Extractor.
  The two will probably be placed under a common interface
  fairly soon, which will allow significant code
  deduplication.