Add 0.2.0 release notes.
Add 0.2.0 release notes.

Thanks @hbredin and @melgor!

nhzandi/openface,Alexx-G/openface,nhzandi/openface,cmusatyalab/openface,cmusatyalab/openface,Alexx-G/openface,xinfang/face-recognize,nmabhi/Webface,francisleunggie/openface,francisleunggie/openface,cmusatyalab/openface,nmabhi/Webface,Alexx-G/openface,nmabhi/Webface,xinfang/face-recognize,xinfang/face-recognize,nhzandi/openface,nmabhi/Webface,francisleunggie/openface,Alexx-G/openface