Update README.md
Update Nextpeer Android SDK to 1.4.0
Update Nextpeer Androdi SDK to 1.4.1
Update Nextpeer Android SDK to 1.4.2
Sync events support
Update Nextpeer iOS SDK to 1.7.0
Update Nextpeer Android SDK to 1.4.3
Update Nextpeer Android SDK to version 1.4.4; iOS SDK to version 1.7.1
Update Nextpeer Android SDK to version 1.4.5
Update Nextpeer Android SDK to version 1.4.5; iOS SDK to version 1.7.1
Merge branch 'master' of https://github.com/Nextpeer/Nextpeer-Cocos2dx
Update Nextpeer Android SDK version to 1.4.6
Merge branch 'v2'
Update Nextpeer SDK iOS to 1.7.2 and Android to 1.4.7
Merge branch 'v2'