Added validate::isPayServerIp

Merge pull request #11 from paynl/Validate-IsPaynlServerIp

Validate is paynl server ip

Some bugfixes and typos

Merge pull request #10 from paynl/pr/9

Pr/9

Added instore payments

Added classes for instore payments, and placed the samples in sub folders

Bugfix

Api\Transaction\Start was throwing a wrong exception
Also added an alias fo isCanceled (isCancelled)

Ipaddres configurable

The ipaddress is now configurable.
Added some extra functions to the transaction info result

Added currency

Added currency and made all address items optional

Better ipaddress resolving

Fetching the ipaddress of the enduser, now also works behind proxy or loadbalancer

First release

First release of the sdk