DB Migration

Changes were made to the database schema because of migrations.
Merge branch 'master' of https://github.com/Tripleberryflip/event_app
Judge and score sheet functionality

Fixing and optimizing the judges ability to view and evaluate/fill out
score sheets for competitors by taking out the event_id from the score
sheet so that it may instead be referenced through the judge/competitor
(User stories 14, 15, and 16).
jQuery and AJAX functionality

Starting the process of switching necessary functionality over to AJAX
requests for a more efficient and user friendly application, beginning
with competitors. I created the js 'new' and 'create' files in addition
to a js form that allows an AJAX form to be rendered with the proper
jQuery mobile styling for creating a new competitor (User story #10).
View changes that coincide with the AJAX

Changing views that correspond to the AJAX functionality changes having
to do with creating competitors for events (User story #10).