Much cleanup for the gradApplication schema:

* Fixed whitespace (tabs and spaces were mixed)
* Added list of countries. Not sure where this should live
     eventually, but for now it's here.
* Made the race/ethnicity match the actual application.
* Changed weird "yes" and "no" boolean fields to single boolean values.
* Enums... enums everywhere.
Further normalized and made more accurate the schema
Fix Mongoose subdocument errors and formatted syntax to make jshint happy.
Moved countries out of gradApplications model, display country selector on create application screen
Removed unused config/countries.js file
Made the home page a little less default.
Allow detailed entry on the creation page, for later display
Improve saving, and add PDF view