Support for client version 7.6

Tell me if there are parts which I should change.

- Not everything is tested yet, feel free to report bugs in 7.6
- the data send in between login opcode and account data might not be
correct, but I could not find any documents showing the right protocol
yet
- Hotkeys working

modules/gamelib/game.lua

@@ -34,11 +34,11 @@ end
 
 function g_game.getSupportedClients()
   return {
-    810, 811, 840, 842, 850, 853, 854,
-    860, 861, 862, 870, 910, 940, 944,
-    953, 954, 960, 961, 963, 970, 980,
-    981, 982, 983, 984, 985, 986, 1001,
-    1002, 1010
+    760, 810, 811, 840, 842, 850, 853, 
+    854, 860, 861, 862, 870, 910, 940, 
+    944, 953, 954, 960, 961, 963, 970,
+    980, 981, 982, 983, 984, 985, 986, 
+    1001, 1002, 1010
   }
 end