Ranks are now based on a lookup table instead of old-school enumerations. This will allow for greater flexibility in the future for how students (and administrators) define their ranks.
Merge branch 'master' into dev
You can now specify a student's rank when they register.
Students now have uniform and belt sizes associated with them.
Merge pull request #3 from brobo/dev

Dev
Super minor bugfix involving sorting students by rank.