Added finished fields for plantings
Added scopes for finished and current plantings
Added finished fields to planting form and display
Added a button on the planting details page to mark as finished
Updated garden page with "finished" plantings

Also added a similar "mark as inactive" button for the garden itself
and rearranged some things on the page.
Automatically set plantings to finished when a garden is marked inactive
Add finished planting data (and buttons) to plantings index
Add finished planting data (and buttons) to plantings index

I also removed description from the table as it was getting way too full
Improving test coverage for gardens
Remove puts used for debugging
Added test to make sure the wrong plantings aren't finished
Merge branch 'finished' of github.com:Skud/growstuff into Skud-finished

Conflicts:
	spec/features/plantings/planting_a_crop_spec.rb
Merge branch 'Skud-finished' into dev