Author: Shamim Rezaie
MDL-69166 pg_paypal: A new payment gateway is born
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a5d219b811a4e7c51ddeaf31526a1473b9930f10
http://github.com/moodle/moodle/commit/a5d219b811a4e7c51ddeaf31526a1473b9930f10
+ 4.0 en [gatewaydescription,pg_paypal]
+ 4.0 en [gatewayname,pg_paypal]
+ 4.0 en [pluginname,pg_paypal]
+ 4.0 en [pluginname_desc,pg_paypal]