Version 0.6

* new database schema: all TEXT columns: NOT NULL default ''
 * new
database table: 'site_history'
 * siteinfo plugin now updates table
'site' and adds to table 'site_history'
 * new CLI and WEB actions for
wiki history
 * tablesorter on web lists of [topics, networks,
languages, versions, history]
 * result messages for web admin tools:
add site, edit[/delete] site
 * minor fixes and updates