Beginning to implement AngularJS. This commit may be broken
Merge branch 'master' into angular
Added ability to view previous day information
TODO: Fix dropdown ID fields
TODO: Add ability to view different user data via user dropdown menu
Added AngularJS service to show previous weights
Cleaned up index.html
Fixed automatic hiding rows based on selected exercises
Fixed exercise dropdown not having correct "name" attribute
Updated CSS
Updated php service call to support user IDs passed in via GET
Added functionality for user switching dropdown menu