Add testing section to README

This changeset adds a section on testing to the `README`. I try to run
this locally before submitting PRs. It is pretty much exactly what
Jenkins does as part of the PR and merge to `develop` builders.
Add more useful unicode method for event
Fix bugs in event detail row
Enhance event lists

Add controls for filtering
Add links for loading in chunks
Fix querysets to show pertinent events to users
Add event list to group detail page
PR Fixup: rename event_list not to clash with partial
PR Fixup: how did this end up in there?
PR Fixup: simplify use of staticmethods
PR Fixup: improve documentation
PR Fixup: prefer explicit urls

This was the right idea.
PR Fixup: use misc better js conventions

don't require anchor in selector
don't delegate events off body
use closest instead of parents
don't use and init block
PR Fixup: disable clicking on currently active filter
PR Fixup: use better var name
PR Fixup: handle private events correctly
PR Fixup: Fix filters

What Rick pointed out was a bug, not an ambiguity. All event lists were
showing filter controls.
PR Fixup: (not from comment) Don't display headers for empty event_lists
PR Fixup: drop href too!