Add exclusion filter for entries.
=================================

Add a way for users to add regexes for entries to be ignored in the
display. Exclusions may be per-timeline or per-user.

Resolution
----------

``ts_user`` and ``ts_timeline`` both support an exnteded data property called
``entry_exclusions`` which accepts a list of regular expression strings. Any entries
whose marks match any of the regular expressions should be excluded from view.

EntryListView.render filters out any matching entries from its display. It still
takes them into account when calculating the duration of other entries.

----

========= ==========
Created:  2011-06-10
Resolved: 2011-06-15
========= ==========