added header
Made significant css changes.
revised sign up forms; added new images.
made a bunch of changes to views. minor change to a spec.
a bunch of huge changes to views. fixed currency issue with both herd and supply tables. added supply table.
added acceptance tests for supplies table; modified some failing acceptance tests resulting from view changes.
small view tweaks
added foods table; views; initial specs; controller.
added acceptance tests for food; added model tests for food; further tweaking of views.
Merge branch 'add-feed'