Update input.page: instruction for quick tag entry

Describe the entire
`time_info activity name @category, some description #tag #other tag with spaces`
quick entry syntax -- previously versions didn't explain how to enter tags, and I
had a devil of a time until I discovered the comma was needed.
Merge pull request #171 from sietse/patch-1

Update input.page: instruction for quick tag entry
drop the reverse_search_terms flag as python dbus doesn't support optional flags and then we have to do the whole version dance between hamster and extension
move reverse_search_terms logic into search terms themselves - flip if search starts with 'not '
add "fork at will" on top

didn't find a proper new maintainer and not having time to deal with even looking or training one myself, so i'm bailing out and for good (give or take)
add link to the wiki placeholder for forks
Fix glib import
Fix a crash in facttree if self.vadjustment=None
Pango escape fact description
Fix UnicodeDecodeError in format_range
Merge pull request #179 from gkarsay/master

3 bug fixes
update from /experiments
Wrap StringIO so CLI export works in non-UTF8 bash environments (Fix for Issue #94)