IOS SDK API update
beta SDK update
添加cocos2d-x plugin android sdk，修改readme.md ,添加android 文档
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
1.7.1 sdk lib
Update README.md
Update README.md
Update README.md
remove ios demo
fix tagsAlias null bug
fix tags equal null crash
change filter API
delete old comment
modify some interface
resolved merge confilts
modified readm