0.2:	* Added the surface "background"
	* Added the functions DEBUG_TIMER_STOP()
	  	    	      DEBUG_TIMER_END()
			      erase_fullpolygon()
			      erase_fullrectangle()
			      erase_polygon()
			      erase_rectangle()
			      erase_screen()
        * Some bugfixes in the sound
	* Now weaver works as a portable app. The script works well even if
	    the program wasn't installed.
	* Now weaver can update weaver directories from previous weaver releases.
	    Just type "weaver PROJECT_PATH".
