Native SDK update

• AdjustIo Android SDK v2.1.6
• AdjustIo iOS SDK v2.1.3

Native SDK update

This update includes:

• AdjustIo Android SDK v2.1.5
• AdjustIo iOS SDK v2.1.2

Android SDK update

• AdjustIo SDK for Android was updated to v2.1.4
• Fixed Android extension build system

AdjustIo AIR SDK alpha

This is the first public release of AdjustIo SDK for Adobe AIR. Please check README for details.