adding the pie-man db with empty schema
adding user and message table migrations
models for user and message tables
adding uniqueness validation for user name
leave method on Message model that can be used for the tell command
also create a User for the author of the message if he's not already in the db
adding a blank? to String
retrieve messages for a user
remove the message after showing
adding a simple Karma model
hooked up the messages with the terrible, terrible command parsing code, god.
pretty printing time distance for messages