Added error logging in OmniKassaHandler.php and OmniKassaReturn.php
Hotfix to properly submit checkbox booleans.

Fixes #4.
Requires Mokuji 0.30.1-beta or higher.
Mention the version in DBUpdates.
Mention next version as well.
Merge branch 'master' into hotfix/0.1.2-beta

Conflicts:
	methods/ideal/RabobankOmniKassaHandler.php
Merge branch 'hotfix/0.1.2-beta'
Merge branch 'master' of github.com:Tuxion/mokuji-payment

Conflicts:
	.package/DBUpdates.php
	.package/package.json
	README.md