adds migrations and models for projects and participations
allow mentors to create projects WIP
create a new project with mentor slots
adds ability to add member slots for projects
allows mentors to join a project
adds authorization for mentors joining projects WIP
prevents non-mentors from joining projects as a mentor
updates specs for joining a project as a mentor
add feature member can join a project
add post and reply models for projects
project participants can post
add threaded comments to projects
improves layout of new project page
improves layout of project index page
adds images to projects with paperclip gem
removes console.log message for rich text editor
moves post and reply features specs into their own files
adds ability to edit a project
adds ability to edit participant roles on project edit
udates project new controller action