added 'core' to source string
PMPS-87 : improved security
Merge branch 'master' of https://github.com/PrestaShop/pigmbhpaymill into develop
// Small fix
Added referrer
Changed Version to 2.0.1
Revert "added 'core' to source string"

This reverts commit d0ef1798fe635c08e76cdb08cb7be4b81973f5bc.
port to standalone version