* Use new "url" features
* Use keg_only DSL
* Use "skip_clean :all" DSL
* Whitespace and style cleanups
* Make bash invocations less silly
* Use new man2-man8 helpers
* Remove "FileUtils." since it is included in Formula
* Use real names for deps instead of aliases
* ENV.x11 now updates path, so remove that from individual brews
* Use a SVN checkout for Metasploit.
The Metasploit tarballs are loaded with .svn folders which we would
have to delete anyway, so use a Subversion checkout and tagged
release.
