Added test for Icepay.
Improved support for Event Espresso 3.1, added iDEAL logo.
Merge branch 'develop' into feature/OgoneDirectLink

Conflicts:
	classes/Pronamic/WordPress/IDeal/Admin.php
	languages/pronamic_ideal-nl_NL.mo
	languages/pronamic_ideal-nl_NL.po
	views/configuration-tests.php