Change AnsiEscapeCodes to static const, should compile on MSVC.

include/AnsiEscapeCodes.hpp

@@ -73,11 +73,8 @@ namespace mcolor
 #pragma region Cursor Controls
         /// Moves cursor to home position {0, 0}.
         static const  std::string CursorHome = AnsiEscapePrefix + "H";
-
-
         /// Moves cursor to line Y, column X.
         static std::string CursorTo(int line, int column);
-
         /// Moves the cursor up # lines.
         static std::string CursorUp(int lines);
 

include/Color4.hpp

@@ -141,6 +141,9 @@ public:
     bool operator==(const Color4& rhs) const;
 
     bool operator!=(const Color4& rhs) const;
+
+
+    std::string ToEscapeCode(bool bg = false);
 };
 
 inline std::ostream& operator << (std::ostream& os, const Color4& c) {