Prototype implementation of timeline calculations within database.

lib/hawat/base.py

...at/blueprints/design/templates/_layout_events_search.html

lib/hawat/blueprints/timeline/__init__.py

lib/hawat/blueprints/timeline/templates/timeline/search.html

lib/mentat/services/eventstorage.py

lib/mentat/services/test_eventstorage.py

lib/mentat/stats/idea.py

lib/mentat/stats/test_idea.py

lib/vial/view/__init__.py