Merge pull request #179 from GinRyan/master

修订了两个文件里注释部分遗漏的更改。
Commit User Corrections
Commit New Post
Update Animations Posts
Update connectivity and contacts provider
allenlsy is assigned to Material Design chapter
Merge branch 'master' of https://github.com/kesenhoo/android-training-course-in-chinese

* 'master' of https://github.com/kesenhoo/android-training-course-in-chinese:
  Update connectivity and contacts provider
  Update Animations Posts
Finish: get started
Update Post
finish: get started
Merge pull request #181 from allenlsy/master

修改Readme中的认领部分
finish: material theme
Merge pull request #182 from allenlsy/master

finish: material theme
Merge pull request #183 from GinRyan/master

翻译ActionBar部分英文注释。
finish card view
Merge pull request #184 from allenlsy/master

finish card view
finish shadows & clipping
Merge pull request #185 from allenlsy/master

finish shadows & clipping
finish drawables
finish drawable and compatibility