Mongodb

[jorisroling]

Added mongodb as dbConnection.databaseType, like so:

config_development.json

"dbConnection": {
    "databaseType": "mongodb",
    "mongodb": {
      "url": "mongodb://localhost:27017",
      "database": "peppermint"
    }
},

[dani-corie]

Thank you for working on Peppermint. :)
In case you're interested in integrating MongoDb support in upstream going forward, could you factor the MongoDb code out into a separate module, so that depending on the configuration, either the Mongo or the Postgres queue module is loaded (sort of like a provider model)?
Many thanks! <3