CLC-3410 Move everything from app/services to lib/services to make thing...

...s run smoother in development mode

https://jira.ets.berkeley.edu/jira/browse/CLC-3410

I was getting "uninitialized constant" errors in development not seen on calcentral-dev's production mode. Moving the app/services classes into lib/services clears up those errors due to some quirk in Rails's loading of classes.