Merge pull request #40 from qiniu/develop

Release 6.0.1
Merge pull request #43 from qiniu/develop

Release 6.0.2
Merge pull request #49 from qiniu/develop

Release v6.0.3
Merge pull request #58 from qiniu/develop

Release 6.0.4
Merge pull request #61 from qiniu/develop

Release 6.0.5
changelog [ci skip]
Merge pull request #67 from qiniu/develop

Release 6.1.0
clean 6.x
android 7.0.0
android studio
[ci skip]
[ci skip]
changelog
dot file
Merge branch 'master' of github.com:qiniu/android-sdk
remove useless xml
remove workspace xml
[ci skip]
[ci skip]
Merge branch 'master' of github.com:qiniu/android-sdk