add link and empty form partial
add models for sponsorship and group
add admin for sponsorship levels
clean up
categories for sponsorship level
controller cleanup
add amount to form, and sort by amount on index
force choosing a category on sponsorship admin index
redirect with category on create/update
remove sortable UI
remove sortable UI, part 2
refine model, table and seeds for sponsorship
fix seeds
update schema
remove sample CMS fixtures
fix site name for admin
add unique constraint to Sponsorship model
handle empty categories in sponsorship
add first rspec feature tests
add Guard for tests