add parallel
Hide cart after creating reservation, per #326
Method make_cart_compatible to ensure backwards compatibility afte #587, as per #667
Added test for make_cart_compatible
Method make_cart_compatible to ensure backwards compatibility afte #587, as per #667
Added test for make_cart_compatible
Merge branch '667_cart_compatibility_upgrade' of https://github.com/YaleSTC/reservations into 667_cart_compatibility_upgrade
resolves #651
Hide cart after creating reservation, per #326
Rebase off development
reduces number of db queries
Merge pull request #672 from YaleSTC/326_hide_cart_on_create

Hide cart after creating reservation (as per #326)
Change to is_a? Hash as per @orenyk's suggestion
Merge pull request #678 from YaleSTC/651_fix_nickname_migration

Fix nickname migration
Merge pull request #669 from YaleSTC/668_parallel

add parallel
Merge pull request #676 from YaleSTC/667_cart_compatibility_upgrade

Implements cart compatibility upgrade, as per #667.
O(1) QUERIES FOR VALIDATE ITEMS
Merge branch 'development' into even_better_validations
removed renewal change and added benchmarking test
num_available o(1) query