Add .ruby-version and .ruby-gemset files for new versions of rvm and rbenv
Merge branch 'master' into development
Remove unnecessary files
Refactor general to use attendee instead students
Change migrations to attendee table
Add admin namespace and graphs module
Create rake task to populate systems and sizes
Add style to center the content
Add the fields on attendees show and remove unnecessary files
Merge pull request #3 from vicmaster/development

Development