Fixed no DLL export for Math/Color.
Implemented Light component.
Added light entity to test scene.
Eradicating "EC_"; only 3 hits in the codebase any more.
Move Tundra::Color<->Urho3D::Color interop to Tundra::Color to have it consistent with MGL classes and their Urho3D interop when it lands to MGL.
Fix build (damn you MSVC!).
Rename EC_Mesh::materialRefs's attribute name from "Mesh materials" to "Material refs" while keeping backwards compatibility with old TXML ( http://git.io/rAfzIQ). Some cleanup while at it.
Promote usage of nullptr + remove accidentally left debug print in previous commit.
Try again on the compiler warning suppression, forgot the 'no' :)
Merge remote-tracking branch 'origin/master' into gtest