Commerce PayTabs

This module integrates PayTabs with Drupal Commerce.
This is an offsite payment gateway. It provides credit card payments only, so far.

Installtion instructions:
* You can install this module via Composer (recommended), or
* clone it from drupal.org Git repo, or
* Download the module from drupal.org

Make sure to enable the 'Telephone' core module after installtion since this gateway requiers a phone number. A telephone field is added to the customer profile created by commerce.
This module may use external libraries in its future versions.

A merchant account at https://www.paytabs.com/sign_up is required.
API documentation for PayTabs is availabe at: https://www.paytabs.com/PayTabs_API_Documentation_V2.8.pdf

Go to your PayTabs's account dashbaord and set your website url there. It's important because according to there documentation:
'The API V 2.x requires that the requesting website be exactly the same as the website/URL
associated with your PayTabs Merchant Account. The merchant can see this SITE URL on his
dashboard, under “My Profile”'

Issues:
The cancel link on the pay page of PayTabs does not cancel payments when redirected to Drupal commerce. Paytabs API does not implement a 'Cancel URL' parameter.