Fixing bug with decorators and help

Since we depend on __doc__ for the help documentaiton I am adding
the use of functools to preserve the __doc__ string when decorating
functions from utils.

docs/dev_install.rst

@@ -11,7 +11,7 @@ Installation for development
     $ pip install -r requirements.txt
     $ pip install -r docs/requirements.txt
     $ touch local_settings.py               # configure your local settings
-    $ matterbot                             # run bot
+    $ mmpy_bot                              # run bot
 
 
 .. code-block:: python

mmpy_bot/utils.py

@@ -3,6 +3,7 @@
 import logging
 
 from six.moves import _thread, queue
+from functools import wraps
 
 logger = logging.getLogger(__name__)
 
@@ -34,6 +35,7 @@ def do_work(self):
 
 def allow_only_direct_message():
     def plugin(func):
+        @wraps(func)
         def wrapper(message, *args, **kw):
             if not message.is_direct_message():
                 return message.reply("`Only direct messages is allowed`")
@@ -46,6 +48,7 @@ def wrapper(message, *args, **kw):
 
 def allowed_users(*allowed_users_list):
     def plugin(func):
+        @wraps(func)
         def wrapper(message, *args, **kw):
             user = message.get_username()
             user_email = message.get_user_mail()