1.2.0

EasyAR 1.2.0 has two major improvements on user experience.

1) Tracking stability has been dramatically improved. It is more accurate and robust.

2) For Unity3D users, Visual C++ 2015 Redistributable Package on Windows is not a requirement anymore.

Detailed changes made since EasyAR 1.1.0 include the following.

+ dramatically improved tracking stability and accuracy

+ Unity: removed dependency of Visual C++ runtime library

+ Unity: added OpenGLCore support for Unity 5.3+

+ Unity: added more guide for first use

+ Unity: added an option to turn off video not support message

* fixed iOS video playback black in some conditions

* fixed Android video playback on some devices

* Unity: minor changes of some interfaces

* Unity: fixed invalid aabb

* Unity: fixed Unity 5 gray screen when create use prefab

* Unity: fixed the compatibility of postbuild script in Unity 4.7

* other refines and bug fixes

* put one Unity sample into the package