PSR 2 required to meet contributing guidelines

[eileenmcnaughton]

https://github.com/omnipay/omnipay/blob/master/CONTRIBUTING.md

We need to meet psr2 to contribute back - in particular we need unix style line breaks not windows style ones - I can see windows style ones coming in - presumably from your editor since I have mine trained I think

2.2 Files

All PHP files MUST use the Unix LF (linefeed) line ending.

All PHP files MUST end with a single blank line.

The closing ?> tag MUST be omitted from files containing only PHP.

[eileenmcnaughton]

nb code coverage is currently 64% - the 100% he asks for seems pretty high

[eileenmcnaughton]

Yep - all done :-)