Bump requirement for packetfu

Not sure why this version is pinned, I'm pretty trustworthy.

I would love to see @jlee-r7 or @hdm-r7 land this, since they were the
ones who so a problem with binary regexes in 1.1.8
Gemfile.lock, too
Add .ruby-version and .ruby-gemset for RVM

Using this will strongly encourage RVM users (which should be most/all
devs) to use Ruby 1.9.3-p448 and a gemset named "msf"
Remove gitignore, change to metasploit-framework
Land #2361, bump packetfu
Land #2365, .ruby-gemset and .ruby-version files
Merge remote-tracking branch 'upstream/master'