Minor changes to math module

-Fixed missing Set method: "X::Set(const X&)"
-Removed operator String


Former-commit-id: 690f161704ed85fc57a62b812af7933e390572b5

include/Nazara/Math/EulerAngles.hpp

@@ -38,8 +38,6 @@ template<typename T> class NzEulerAngles
 		NzQuaternion<T> ToQuaternion() const;
 		NzString ToString() const;
 
-		operator NzString() const;
-
 		NzEulerAngles operator+(const NzEulerAngles& angles) const;
 		NzEulerAngles operator-(const NzEulerAngles& angles) const;
 		/*NzEulerAngles operator*(const NzEulerAngles& angles) const;