Added fetch methods

Fetch methods from Mollie

PR fixes

travic-ci errors fixed

Add test

Add test

ps fix

fix psr

fix comment

Fix array layout

fix psr

fix psr

update psr

fix psr

fix psr

fix psr

fix doc

Add Mock
Merge branch 'master' of https://github.com/nettob/mollie

Conflicts:
	tests/Omnipay/Mollie/Message/FetchMethodsRequestTest.php
	tests/Omnipay/Mollie/Mock/FetchMethodsSuccess.txt