Update dependencies, include 64bit arch

This may only be an issue when using frank in Ruby Motion, but when I attempt to run my frank features with the latest version of RubyMotion the skeleton doesnt get included because the 64-bit arch isnt included.  I think this is a guard clause so since apps will require 64-bit architecture to be included starting in Feb 2015.

In any event this makes it possible for me to use frank again on my project, so I'd like to see it merged if it isnt a breaking change for other users, etc.