Merge pull request #4 from seantaylor/2-1-lav

Add in Mailer for gift cards issued
Add a button to void gift cards.
Add a restore button in place of the void button.

When current value == 0.
Revert "Add a button to void gift cards."

This reverts commit 9a6119d31d9a314469c426ba99cca8a67184a7e3.
Add a button to void gift cards.
Add a restore button in place of the void button.

When current value == 0.
Merge pull request #5 from Senjai/2-1-lav

Add restore and void buttons to the admin interface.
Basic sort.

Uses ransack.
Super basic styling
Use select2 styles
Merge pull request #6 from Senjai/2-1-lav

Basic sort support for gift cards.
Add email and gift code fields to the fit card search.

Also clean up the styling
Merge pull request #7 from Senjai/2-1-lav

Add email and gift code fields to the gift card search.
Merge remote-tracking branch 'upstream/2-1-lav' into 2-1-lav