Regenerate app using 3.2.13

I ran `rails new money-tracker` from the parent directory of my money-tracker
app. This overwrote some files and created others that would've been created
if this app had started out on 3.2 (it actually started out on 3.0).

The next step is to use the asset pipeline rather than the static assets I
currently have in public.
Use asset pipeline

* Enabled assets in application.rb

* Moved styles in public/stylesheets/money_tracker.css to
app/assets/stylesheets/application.css

* Moved javascript in public/javascripts/application.js to
app/assets/javascripts/application.js

* Updated application layout to pick up assets files

* Removed outdated jquery libraries

* Removed app/assets/images/rails.png

* Removed public/images/rails.png