upgrade thinking-sphinx gem
double max comment edit time to 90 minutes
only show invitation queue link if there are any pending
try really hard to convert inbound mail to utf8
color 'ask' tag specially
rip out default filtered tags
in moderation auto-message, tell the user it's automated
disable autocomplete for text fields that shouldn't use it

new password on settings form and user invitation form (would be
another e-mail address, not the stored user's)

closes #85
Merge pull request #81 from srgpqt/master

simplify user tree controller action and template
Merge pull request #83 from srgpqt/sphinx

upgrade thinking-sphinx gem; requires sphinx >= 2.0.6