Service name is wrong on Debian

[Wolodja Wentland]

As discussed in #8 this formula uses mongod as service name for Debian (and other distributions of the same os_family) while it should be mongodb. This causes the following error during the installation on wheezy:

----------
          ID: mongodb_service
    Function: service.running
        Name: mongod
      Result: False
     Comment: Failed to start the service
     Changes:   
              ----------
              mongod:
                  False

Rather than extended support for the PPA it would be nice if this formula could support the standard packages in Debian and, if support for newer versions is needed, also wheezy-backports.

[Roman Gorodeckij]

Confirming on Ubuntu 14.04

[Nitin Madhok]

@BABILEN @holms Can you create a PR to make the required change in map.jinja ?

[Wolodja Wentland]

Fixed in #11