Merge pull request #12 from yaplas/refactor/validations

change module.exports by exports
ignores
ignores
Merge pull request #13 from jonymusky/change/git-ignore

Change/git ignore
adding circle-ci config
Merge pull request #14 from benjamine/master

adding circle-ci config
add of states
Merge pull request #15 from jonymusky/add/states

add of states
add payment method validations
update version