Implemented recurrent api

[tomaj]

Implemented recurrent functionality

• recurrent payment - https://doc.gopay.com/en/#recurring-payment
• cancel recurring profile - https://doc.gopay.com/en/#cancellation-of-recurring

also includes new test commands for recurrent charge (test-recurrent.php) and cancel recurrent profile (cancel-recurrent.php)

[tomaj]

Hi, any news regarding this pull request?

[jspetrak]

@tomaj Sorry, we missed the last reply and thought you are still working on the env things... Merged and released as a new version. Thanks!