Fixed compilation configuration error for the e-puck
Added missing const declaration to CVector2::operator== and CVector2::operator!=
Added method CQTOpenGLUserFunctions::DrawText(). Credit to Roman Miletitch for the work.
Made the default color of CLOopFunctions::GetFloorColor() white instead of black.
Minor fixes
Fixed bug in ray cast query of Dynamics2D engine.

The method CDynamics2DEngine::CheckIntersectionWithRay() was erroneously checking only the first hit reported by Chipmunk. When a short object (on the Z axis) was found by the engine, this object was the only one checked for 3D intersection. If this object was not a hit, no further object was checked, resulting in buggy compenetrations.
Added method CRay2::Intersects()
Added success message when a dynamic library is loaded correctly.
Now the default light sensor does not throw an exception if there are no lights in the arena
Fixed small bug in the QT OpenGL main window.

If the step button was pressed, the reset button was activated. Pressing the reset button caused an exception to be raised.
Merge branch 'master' into eyebot