Removed unnecessary @.'s

Since CoffeeScript automatically converts @ to this. when immediately followed by a character.
Updated email hash to Gravatar specifications

Gravatar email hashes have two requirements:
* Whitespace must be trimmed
* Email should be downcased
Update AUTHORS.md
Merge pull request #21 from 5thWall/gravatar_hash

Updated email hash to Gravatar specifications
fix onebox for your own site
Merge branch 'master' of github.com:discourse/discourse
Working out outdated migrations

Several migrations were failing when running db:migrate at the initial release version from an empty database.
These changes took out statements that were causing migrations to fail, usually because of references to models that no longer exist.
Merge pull request #11 from keekerdc/fixing-outdated-migrations

Working out outdated migrations
hook up sanitizer
also for about me
Merge branch 'master' of github.com:discourse/discourse
structure.sql should match mine
Update app/views/static/faq.html.erb

remove example.com from example.com/tos
increase default max_likes_per_day to 30
Remove empty helpers
someone accidentally a word
Merge pull request #34 from mharen/master

Fix minor type in README.md (someone accidentally a word)
Merge pull request #22 from sandal/patch-1

Fix typo in AUTHORS.md
Don't enable Cache-Control if the site has restricted access.
Oops, that should be 1.minute