Gitignore -more.

.DS_Store begon!
Markdown for readme and std BSD license.
Compact ga-js and white-space removal.
Updated gemfile.

Deface pointed to dead branch on @railsdog's upstream which made it
impossible to install locally. Switched to the most resent version on
rubygems to keep the app stable.
Merge pull request #6 from futhr/master

Updates.