Update Bluemix Deployment Instructions To Use Different Mongo Service

[ryanjbaxter]

The MongoLab service in Bluemix will be going away at the end of November. We need to update the deployment instructions as well as the auto deployment button to use a different Mongo service.

[ryanjbaxter]

This is dependent on #1025 being fixed first

[lirantal]

@ryanjbaxter Cool, can you keep an eye out for this and follow with a PR?

[ryanjbaxter]

@lirantal yes waiting on #1025 and then I will update everything and submit a pull request

[lirantal]

@ryanjbaxter you're good to go, #1025 is merged.

[ryanjbaxter]

@lirantal see #1039

[ryanjbaxter]

I will also need to update the gh-pages instructions in a separate pull request i believe

[lirantal]

Sure. See the comments there from @ilanbiala