Adding a tags component
More work on tags.
Simplify front end tag code.
update sql
Add tags to categories and users (users can't render yet because
of acl questions).  Clean up some sql.
Fix a query
Fix more of tags
Docblock work in tags
Work on front end tag display.
Fix ordering in tags
Add tags to category layouts. Add styling to tag layout.
Add missing files!
More strings, add display controls
Return all results for tags and subtags.
Missed front end changes to instance.
Fix front end xml to eliminate irrlevant fields and some spurious code in the route helper.
work on tags
Work on front end tag model and add orderby options.
Add an option to include or exclude results for child tags.
Update sql with new column.