Scene rendering logic is now better

Box objects (AABB) now have the long awaited extent() and center()
methods. Corners are now called “aa” and “bb” for convenience. The
WorldEntity class uses a box3 for its AABB instead of two vec3s.
This allows us to simplify a lot of verbose code.

Reworked Primitive logic for scene rendering
FileUpdateTester works now .....

Revamped thread communication
Fixed dynamic thread Add/Remove
Added unit-test for threads !!!!

- removed 177 CR characters
 - removed 12 trailing whitespaces
 - replaced 0 tabs with spaces
 - fixed 1 svn:eol-style properties

MeshViewer first pass

- removed 18805 CR characters
 - removed 774 trailing whitespaces
 - replaced 1922 tabs with spaces
 - fixed 31 svn:eol-style properties

SDL2: Mouse is back ! With correct focus support
SDL2: Added typing support with keyboard
ShaderBuilder: Refactored and simplified Shader block creation
Several warning removal
Fixed Image::Copy

DefaultThreadManager build FIX

Added InputProfile in Controller
Added ExecLuaCode

Add SafeEnum var in lua
MeshViewer SceneSetup is operational
Added imGui to vs-solution, not implemented yet

- removed 1210 CR characters
 - removed 17 trailing whitespaces
 - replaced 0 tabs with spaces
 - fixed 5 svn:eol-style properties

First pass on EzMesh integration (doesn't work yet)

Big FAT pass on windows-warning. It is better now.

subtelties to avoid polluting Doxygen.