Add Custom mongod.conf support

- I realized that upstart job for mongodb was using `/etc/mongod.conf` instead of `/etc/mongodb.conf` so the file we were sending to the server wasn't being used.
- I renamed `mongodb.conf` to `mongod.conf` (it seemed logical because server is using `/etc/mongod.conf`)
- I added a custom `mongod.conf` support. If you have a `mongod.conf` file in the deploy project folder mongodb will be restarted with that config file when you use `mup reconfig`. This mongod.conf file will be used also with `mup setup`.
- I was getting `build is not a command` error when i try `mup deploy` i changed it to use `meteor bundle` command.

EDIT: i forgot to mention it, i was configured my sublime to beautify on save, i accidentally messed with the code style. Sorry about that :)