Make the hand the default tool

I hope this will nudge people towards watching what is already on the board
before starting to draw.

It may encourage people to be constructive.

This is a (very) small step towards #6

client-data/tools/hand/hand.js

 		"mouseCursor": "move"
 	});
 
+	//The hand tool is selected by default
+	Tools.change("Hand");
 })(); //End of code isolation

client-data/tools/pencil/pencil.js

 		"stylesheet": "tools/pencil/pencil.css"
 	});
 
-	//The pencil tool is selected by default
-	Tools.change("Pencil");
 })(); //End of code isolation