== Naomi C. Bush ==

Special thanks to Naomi C. Bush and her 
Gravity Forms Stripe plugin.

https://github.com/naomicbush/Gravity-Forms-Stripe

I was able to use her plugin concept to help me develop this one.
Some code contribution came directly from her plugin.

== First Data e4 PHP Wrapper ==

Thanks to VinceG for his for the Global Gateway 
PHP wrapper, which we use to perform the requests
to FirstData.

https://github.com/VinceG/php-first-data-api