add created_at model attribute, add days past due to view
add calculated compound interest, show by default in the view
style updates to make status more digestable
pressing return on new/edit loan/person screen calls save method
Merge pull request #2 from joelongstreet/master

Loan Details and Compound Interest
Merge branch 'master' into validations

Conflicts:
	app/controllers/base/controller.coffee
	app/models/loan.coffee