添加User agent
Merge branch 'chundong-master'

Merge pull request #128
Merge branch 'master' of https://github.com/cwq/ijkplayer into cwq-master
Merge branch 'cwq-master'

Merge pull request #129
android: MediaCodec support
NEWS.md: mention MediaCodec support
ijkplayer: cosmetic
ios: fix build
ios/player: init pipeline
ff_ffplay: cosmetic
n0.2.1
README.md: simplify
README.md: simplify
README.md: don't bother working with cygwin
ffmpeg: switch to n2.5
README.md: remove old symlink before make new one