Merge pull request #26 from RichardCardGate/master

Fix: Pending notification.

Merge pull request #25 from RichardCardGate/master

ClientLib update.

Merge pull request #22 from RichardCardGate/master

Fix: add-on compatibility.

Merge pull request #20 from RichardCardGate/master

New installation and settings code.

Merge pull request #15 from RichardCardGate/master

New payment method: OnlineÜberweisen.

Merge pull request #14 from RichardCardGate/master

Check for valid ideal issuers.

Merge pull request #13 from RichardCardGate/master

New directory structure.

Merge pull request #12 from RichardCardGate/master

Added cache for bank issuers.

Merge pull request #11 from RichardCardGate/master

New payment method: Paysafecash.

Merge pull request #10 from RichardCardGate/master

New payment method: Gift Card.