More documentation

README.md

@@ -24,6 +24,13 @@ So we need and have:
     edit the sqlite database
   - extensibility
 
+## Building
+
+You need just to run `make`. Additional dependencies:
+
+- [SWIG](http://www.swig.org/)
+- [WiringPi2 pythonic binding](https://github.com/WiringPi/WiringPi2-Python) (for switching lock on Raspberry)
+
 ## Howto
 
 1. Create the database

brmdoor_adduser.py

@@ -58,6 +58,7 @@ if __name__ == "__main__":
 
 	if opts.config is None:
 		print >> sys.stderr, "You must specify config file via the -c option!"
+                parser.print_help()
 		sys.exit(1)
 		
 	if opts.authtype not in ["uid", "hmac"]: