|BUILD CONFIGURATION|
[Windows::MinGW-w64]
* Defined ZED_WINDOWSYSTEM_WIN32 for the Windows build

|SOURCE|
[Windows::Renderer::WindowsRendererOGL2]
* Replaced both Create member functions with one that takes a CanvasDescription
  and a ZED Window
* Removed deprecated camera-related member functions
* SetRenderState renamed to RenderState
* Removed MessageBox which confirmed the OpenGL version supported by the
  graphics device
[Windows::Renderer::WindowsRendererOGL3]
* Reduced Create member function presence to one
* Removed deprecated camera-related member functions
* SetRenderState renamed to RenderState
[Windows::System::WindowsWindow]
* All references to ZED_SCREEN updated to SCREEN
* All references to ZED_WINDOWDATA updated to WINDOWDATA
* Stubbed-out all member functions
* Added the latest member functions from the Linux version
|SOURCE|
[Common::System::Window]
* Added a pure virtual member function FlushEvents to consume any left over
  events at the users' discression
[Linux::System::LinuxWindow]
* FlushEvents calls XNextEvent until all events have been processed, doing
  nothing other than acknoledging them
Merge branch 'window_manager' of https://github.com/OpenGameDevelopers/ZED into window_manager
|MERGE|
window_manager into unstable
|MERGE|
branch 'unstable' of https://github.com/El-Rico/ZED into unstable