Rather than testing the length of the id, check that it hasn't changed
Merge pull request #563 from joonas/master

Improved TestElsewhere.test_opt_in_doesnt_have_to_change_username
Correct syntax for capturing multiple exceptions.
Merge pull request #564 from joonas/regression-fix-529

Correct syntax for capturing multiple exceptions. Fixes #529
Working on homepage redesign.
Merge branch 'master' of github.com:zetaweb/www.gittip.com
warn and log when someone changes their username.  needed for #223.