Reorganize modules/video_capture.

- The usual elimination of main/source etc.
- Fully qualify "public" includes.
- Use lowercase for all directory names.

Review URL: https://webrtc-codereview.appspot.com/933010

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@3025 4adac7df-926f-26a2-2b94-8c16560cd09d
83 files changed