OAuth2 OpenID Connect provider support, API and DB refactoring (#3)

Allows Paskia to authenticate the user to a client site.
- User friendly client registration flow on the admin app
- Redirect-based authentication flow (per spec)
- Backchannel logout both ways to keep sessions synchronized
- Groups integrated with Paskia's permission system
- Adds email, preferred username and telephone fields on user profile
- All new user basic info layout to show the new information, better looks
- API and DB structures redesigned
- Various unrelated fixes to theming and layout

paskia-js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "paskia",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "description": "Paskia authentication utilities for JavaScript",
   "author": "Leo Vasanko",
   "license": "Unlicense",