dengitor+assets+tests-v0.6.0

This release removes glfw dependency. nothing in particular is wrong
with it, just that the project has matured enough to not rely on it.
please note controller input and x11 input is slightly broken. x11 input
is still single threaded

Notable mentions:

• NSL to have some nice bullet physics with shadows too!
• DengineRC to build resources and remove pesky file system dependencies
• Shader and Texture making. This is more flexible than returning heap
  allocated objects
• OpenSans light will always be embedded into dengine-gui
• No more vertex arrays unless opengl/es 3.2+
• Zip reading util can decompress to memory block
• Logging colors now actually work. Remember to reset after changing!

Please note this release does not include python for windows. This is because there will be changes in how python is embedded in the next release