0.0.4 pre-alpha

0.0.4 pre-alpha with triangle working example

Changelog:

• small cleanup
• added readonly Color class
• set update thread name
• introduced more abstraction to reduce direct OpenGL calls in SimpleGameApp
• added some GLFW hints and set OpenGL version to 3.2+
• configured GLFW to use highest OpenGL version as possible
• added data directory
• added one vertex and one fragment shader
• added some classes to manage Assets
• added some classes for Meshs
• added class FileUtils
• added cache directory
• added FileCache Api
• added triangle working example