The display manager internally  intercepts the input events.
Added a mesh display asset stub.
Added display asset stub and improved the design.
Added mesh stub.
A mesh display asset can have a default configuration.
Corrected the display asset implementation that would not compile.
Added mesh, triangle and specialized mesh stubs.
Improved the mesh and triangle stubs.
Color class implementation.
Proper bug correction to let colors work correctly.
Mesh display assets now accepts a display mesh and not a simple one.