Major: 0.3.12

[WARNING: THIS COMMIT CANNOT BE COMPILED ON MAC]
New Features:
1. Initial Mac OS X support.
Major: 0.3.13

Bug Fixed:
1. Fixed the crashed bug caused by not check bug.
2. Fixed the default header text color bug.
Merge branch 'new-core' of https://github.com/Kreogist/Mu into new-core