Merge pull request #20 from swansond/UI

Looks like we all agree that this is ready to merge, with some minor style caveats. Specifically: making it clear that Bathroom and Review are pure data classes, we should name them as such (append "Data" to those classes) and get rid of getters/setters and just make all fields public final.

Also, need to rename Bathroom to Lavatory.
Merge pull request #24 from swansond/UI

Minor style things aside, it all looks good.
Merge branch 'UI' of https://github.com/swansond/LavatoryLocator into UI
Added temp login system