camera free fly implement
default texture set
Gitignore correction
Adding Doxygen generation at build

Adding an html documentation generation when building in realese x64
Thread safe imgui disabled
imgui rendering sketch
imgui drawing
input race condition fixed
Configuration adding .dox files at input

.dox files in the Documentation\configuration folder are now read by
Doxygen
lighting correct
commit for merge
Merge branch 'master' into deffered_shading

Conflicts:
	GameEngine/EngineCoreTest/Scenes/BenchmarkScene.cpp
naive imgui integration
merge with deferred and camera freefly
Engine class first documentation
Merge remote-tracking branch 'origin/documentation'
specular not correct totally
texture conversion and load fixed
merge
performance tests