Make `shorten_line` function available to templates.
SpamFilter plugin: show full date/time in ClearSilver template
SpamFilter plugin: Fix Genshi leftover in ClearSilver template
SpamFilter plugin: fixes for columns types in the model
SpamFilter plugin: fix another stupid typo in the ticket adapter
SpamFilter plugin: fix a typo in the ticket adapter, and include package data
SpamFilter plugin: flag as not `zip_safe`
SpamFilter plugin: fixed unit test.
SpamFilter plugin: various fixes and minor tweaks.
SpamFilter plugin: implemented ClearSilver versions of the admin page templates.
