remove the roller_userattribute table?

[Glen Mazza]

Hi team, I know we're trying to get 5.1 out but I see a nice database 
and code simplification possibility.  The Roller team created the 
roller_userattribute table as part of the Roller 4.0 to 5.0 migration, 
but through the years we've never needed it for more than its original 
purpose of storing OpenID values, and since most aren't using OpenID, 
it's hardly ever used.

In createdb.vm, I'd like to add a nullable "openid" column in the 
roller_user table and just drop the roller_userattribute table, and 
recode the app to read that column.  In the 500to510 migration script, I 
will keep this table in case users are using it for something else, but 
copy the openid values, if any, into roller_user.  WDYT?

The latest blogging tools such as those that post to GitHub Pages as 
well as wiki products like JSPWiki don't even use databases, so I want 
to make sure we keep the signal-to-noise ratio of our database pretty high.

Regards,
Glen