Making contribution keys case insenstitive as per #1695
Saves in lowercase and checks are performed lower case. #1695
Merge pull request #1767 from jdalphon/jd_issue1695

Case insensitivity for contribution keys
fixes tutorial index from breaking
Merge pull request #1770 from asalani93/as_emergency_tutorial_fix

Fixes tutorial index from breaking
Merge remote-tracking branch 'upstream/master' into jp1678