Upate configuration file and its handling

* Update `rooms` section from list to dict
* Update `plugin` section from list to dict as well, plugin name is now key for dict of configuration. Thus, add `name` variable to constructor 
Well, not. It was debug line 

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> On 31 Oct 2014, at 11:55, Anton Balashov <notifications@github.com> wrote:
> 
> In main.py:
> 
> > @@ -15,13 +15,12 @@ def dispatch(message, rooms):
> >      except ValueError:
> >          print('Incoming message was malformed')
> >          return
> > -
> > +    print(rooms.keys())
> Should it be in the master?
> 
> —
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