generate cow model and update migration with precision and scale
Merge branch 'master' into ryan/cow

merge in latest changes from upstream
setup db and migrate
generate cows_controller
build out cows_controller with basic CRUD actions
generate migration to add total_weight and tag_number fields to cows
update cows_controller with new fields
migrate db
add validations to cow model
generate migration to add index on cow tag_number
update migration with correct params and migrate db
resolve conflicts in schema.rb
Merge pull request #5 from vidkun/ryan/cow

Merged #5