add Gemfile.lock
add rubygems to gemfile
add port parameter to Procfile
parse database details from URL
add thin webserver
implement proper find for IdRecord
also properly handle user_id column for items
add relations between users and items
simplify describe_user
make filter helper ready for non-hash data
remove 'hash' filter
begin item description
simplify user route
catch non-existing items and users
add item type relation
simplify route management
breakup helpers in separate modules and files
add ratings to models and item description
fix item description: id was missing