Minor extensions to script interface:

- quad_setRepeatTexture()
- quad_setRepeatScale()
- quad_isRepeatTexture()

(bone, entity, ... as well)

- getOldDT() - return unmodified dt
- getDT() - as passed to update(), for complicated edge cases
            where dt is unavailable but required.

BBGE/Core.h

@@ -1277,6 +1277,7 @@ public:
 	float aspectX, aspectY;
 
 	float get_old_dt() { return old_dt; }
+	float get_current_dt() { return current_dt; }
 
 	bool debugLogActive;
 
@@ -1330,6 +1331,7 @@ protected:
 	void initIcon();
 
 	float old_dt;
+	float current_dt;
 	
 	std::string debugLogPath;