Added Matrix types to Variant. Added ToString() to Matrix types. Added Matrix getters/setters to XMLElement. Added ToMatrix string conversion functions. Added possibility to assign shader parameters from Matrix variants. Fixed missing setting of Color variant shader parameter on Direct3D9.
Travis CI: API documentation update at 2014-03-31 22:44:26 UTC.
[ci package]
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Source/Engine/LuaScript/pkgs/Core/StringUtils.pkg
	Source/Engine/LuaScript/pkgs/Core/Variant.pkg
	Source/Engine/LuaScript/pkgs/Math/Matrix3.pkg
	Source/Engine/LuaScript/pkgs/Math/Matrix3x4.pkg
	Source/Engine/LuaScript/pkgs/Math/Matrix4.pkg
	Source/Engine/LuaScript/pkgs/Resource/XMLElement.pkg