Delete README.rdoc
Update README.md
Added Course to Semester functionality
Merge branch 'master' of https://github.com/RPI-RCOS-PlanofStudy/PlanofStudy
Added course removal

Changed course semester relationship to has_and_belongs_to_many
added migration file
Rearrange columns in Plan view to reflect plan titles
Merge branch 'master' of https://github.com/RPI-RCOS-PlanofStudy/PlanofStudy

Conflicts:
	app/models/course.rb
Merge branch 'master' into majors