Display related status in checkboxes

Added documentation too.
Hide form variables
Use id as value in checkboxes
Fixed double increment in next_meeting
Only show items with importance > 0
new - remove unwanted meetings from database
skip meetings

new col in meeting table
category = 1 if the meeting is flagged for skipping
- can be done with remove_meeting.py, or the new 'skip' checkbox in
tag.php
index.php now check for category when displaying meetings