Adds support for 'x_email_customer'.
Merge branch 'master' of https://github.com/agiliq/merchant
Removes duplicated email_customer option read.
Merge branch 'master' of https://github.com/agiliq/merchant
Fixes ValueError exception when CC number contains non numeric chars
Merge pull request #75 from juliomenendez/master

ValueError exception raised when CC number contains non numeric characters