Elasticsearch schema fixes.

Based on the kixi.amon-schema.

Done manually for now, but more complete than before.
Merge pull request #170 from MastodonC/feature/es-schema

Elasticsearch schema fixes.
Password reset

- Add UI
- Add API routes
- Update Cassandra schema
- Update k.h.d.users
- Upgrade clj-http
- Add migration doc
- Redirect to login when password changed.