Many enhancements in client API

* Fix issues in item use
* Stack animated texts values
* Add utility functions for changing creature color and jumping
* Add some new extended functionality
* Improve map shader API

src/client/spritemanager.h

@@ -34,7 +34,7 @@ public:
 
     void terminate();
 
-    bool loadSpr(const std::string& file);
+    bool loadSpr(std::string file);
     void unload();
 
     uint32 getSignature() { return m_signature; }