Update README.md
Some change (dunno)
Merge branch 'master' of github.com:marcel-valdez/algorithms-data-structures
A test seemed to fail due to lack of parenthesis in Ruby 1.9.2
Made it compatible with Ruby 1.9.2
Commit for merge with master
Merge branch 'master' of github.com:marcel-valdez/algorithms-data-structures
Added command line options to the guard file.