Initial commit
Initial commit
Add spec for failing case
Add note on rails README.md
correct spelling mistake
add specs and make luhn function operational
Merge pull request #2 from s01ipsist/make-it-work

add specs and make luhn function operational
Add valid USI to README.md example
Add description of what USI is
Add travis configure
Add script command to travis build script
Split the luhn code into its own class
make validator compatible with Ruby 1.8

Ruby 1.8 provides the integer code of the character when using an array lookup on a string
remove 1.8 from Travis build as it actually requires a bunch more changes to the development setup to run properly
Merge pull request #3 from s01ipsist/ruby18

make validator compatible with Ruby 1.8
make gem rails 2.3 friendly