Add Raffle scaffold

rails g scaffold Raffle creator_id:integer link_snippet:string
title:text description:text start_time:datetime end_time:datetime
win_chance:float current_entries:integer max_entries:integer
is_done:boolean
Add Tf2rUser scaffold

rails g scaffold Tf2rUser steam_id:integer username:string
avatar_link:string posrep:decimal negrep:decimal is_mod:boolean
rank_id:integer
Add Entry scaffold

rails g scaffold Entry raffle_id:integer tf2r_user_id:integer
position:integer
Fix up TF2rUser view spec