Documented WTF a boustrophedon is
Updated Gemfile to https
Added .rvmrc
Add lib to $LOAD_PATH in spec_helper
Added note about 'prime' in Ruby 2.0 StdLib

* Basically all my prime number and factorization code is now
  implemented in C by the Ruby StdLib which should make it much, much
  faster

* I'm not actually updating any of my code here, I'm just saying that
  this is a thing