Wrap run() inside if __name__.

gitstats

@@ -1174,6 +1174,7 @@ Default config values:
 		exectime_internal = time_end - time_start
 		print 'Execution time %.5f secs, %.5f secs (%.2f %%) in external commands)' % (exectime_internal, exectime_external, (100.0 * exectime_external) / exectime_internal)
 
-g = GitStats()
-g.run(sys.argv[1:])
+if __name__=='__main__':
+	g = GitStats()
+	g.run(sys.argv[1:])