do not overwrite files from git

Author: Anton Kex, Tanel Õigeäär

autoupdate.py

@@ -18,12 +18,12 @@ def _check_for_updates(self):
             self.indicator.restart()
 
     def run(self):
+        if (os.path.exists(".git")):
+            return
         while True:
             try:
                 self._check_for_updates()
                 time.sleep(60*5)
             except Exception as e:
                 print 'Failed to update: %s' % e
                 time.sleep(60*60)
-
-