Adds overflow:hidden to .box selector.

Without it, the .box would not be as tall as its content. While
that works fine for Askbot's default skin (boxes are white on a
white background), it will fail on skins in which boxes have a border
or a different background color. There's no reason not to fix this
in the default skin.
Prevents sidebar footer from showing, if it's not defined.
Add MySQL support for safe_add_column.
Make column changes actually work with InnoDB
Fix fake migration errors so we can find the real ones.
fixed some issues in postgres full text search and transferred "deleted" info onto the thread objects
disabled launchpad login by default
allowed to created tags upon subscribing to them
updated the changelog file
Merge pull request #114 from tmandry/master

Fix bug causing askbot-setup script to never accept a sqlite filename
Merge pull request #106 from emonty/master

Fix things for MySQL InnoDB users
Merge pull request #97 from siovene/conditional-sidebar-footer

Prevents sidebar footer from showing, if it's not defined.
Merge pull request #96 from siovene/box-overflow

Adds overflow:hidden to .box selector.
some bugfixes
a typo in the documentation
changed the .org link to .com in the footer