1.6.2

Dropped support for Unity 4. Read more here: http://blogs.unity3d.com/2015/12/17/final-release-for-unity-4-x/
Fixed: No longer will silently fail when installation info changes. #41
Fixed: Unity push notifications are now functioning again. #42
Fixed: Rare threading crash in Xamarin.iOS. #53
Improved: Removed 'mutable containers' functionality, significantly enhances performance. #66
Improved: URLs for ParseFiles now use HTTPs when applicable. #59
Improved: Can now query from ParseReleations that were created locally. #73
Improved: HttpClient will no longer fail to report certain rare exceptions. #82