add password and salt to users
add user model validations
add annotate gem
add some user tests
update gemfile
add more user model tests
update user migration to add admin flag
update user model and tests for admin flag
add department model
add some department tests
add user > dept relationship and tests
add project model and tests
update gitignore
add department to user relationship
add department to project relationship
add ProjectUser model (UNFINISHED)
Update project user tests
add ruby-prof gem
add status model
update status and project tests