grim/hgkeeper

Update setup for new auth. Init and read auth work, but read also grants write at the moment
---
global:
init:
- admins
read:
- public
groups:
admins:
- grim
pidgin:
- grim
pidgin-gsoc:
- student1
patterns:
hgkeeper:
read:
- admins
pidgin/gsoc/*:
write:
- pidgin
- pidgin-gsoc
pidgin/*:
write:
- pidgin