HTTP services on same dyno - scaffolding
WIP
Removing first take at UserService
Cleaning up file system
Functioning UserServiceImpl
Updating Procfile and startup script to work with UserService
Updating port where UserService runs
Rails app now consumes UserService

* new User model allows for using Rails path / view helpers by implementing ActiveModel API through Active Attribute
* exposing same routes as in "monolithic" app

unrelated, but part of this commit:
* removing sinatra-reloader gem
* cleaning up Gemfile
* modifying application view to display flash messages
Removing unused db directory