CAT-117 Emailed receipts in SCKO

CAT-117 Emailed receipts in SCKO

Add email self-checkout receipt functionality, including
sql hooks into deploy and revert folder for getting circ
data under email-selfcheck-receipt.sql

Signed-off-by: Kyle Huckins <khuckins@catalyte.io>
Signed-off-by: Skye Howard <showard@catalyte.io>
 Changes to be committed:
	modified:   KCLS/openils/var/templates_kcls/circ/selfcheck/main.tt2
	new file:   KCLS/sql/schema/deploy/selfcheck-email-receipts.sql
	new file:   KCLS/sql/schema/revert/selfcheck-email-receipts.sql
	modified:   KCLS/sql/schema/sqitch.plan
	new file:   KCLS/sql/schema/verify/selfcheck-email-receipts.sql
	modified:   Open-ILS/web/js/ui/kcls/circ/selfcheck/selfcheck.js