Switch QUESTION text to use cr_revisions.content instead of
cr_revisions.title. Upgrade included, tested on Oracle 10g and PG 8.0.
Added automated test for as::item::new
Fix division with empty string in pretty_time proc and added test.
Beginning of work to allow question text (and other CLOB/BLOB columns)
to include HTML from Xinha rich text editor to allow images etc in the
question text, feedback etc. Mainly this allow an arbitrary number of
images or links to files, instead of just one allowed per question.