Self-service info update

[dehnert]

We should allow club members to update their own information by logging in (#3) and using some sort of web form. It's possible we'll want to have changes get emailed out, and may even want some officer to confirm them.

[dehnert]

I think Veronica is going to be looking at this a bit. The desired functionality is probably similar too (but a bit simpler than) the ASA DB's group editing stuff; https://github.com/dehnert/asa-db/blob/master/asadb/groups/views.py#L79 is the code implementing that, while https://github.com/dehnert/asa-db/blob/master/asadb/template/groups/group_detail.html and https://github.com/dehnert/asa-db/blob/master/asadb/template/groups/group_change_main.html are the viewing and changing templates respectively.

[dehnert]

I think this is close-ish to ready.