add "School/District Administrator" as a registration/member/user type

1) Include this option as the last in the "Member Type" selection drop menu in the Join form at https://www.curriki.org/xwiki/bin/view/Main/JoinCurriki in the Interests/Affiliations section.

2) Include this option for "Member Type" display in the Profile tab in My Curriki at http://www.curriki.org/xwiki/bin/view/MyCurriki/Profile

3) Include this option for "Member Type" editing in the Profile tab in My Curriki at http://www.curriki.org/xwiki/bin/view/MyCurriki/EditProfile?user=XWiki.[user_ID_here]