Update README.md
Update eps_start.php

Added explanations and test mode
Update eps_confirm.php

Minor changes
Cleanup eps_start.php

Remove testing switch. Put connection credentials at the beginning with hint on test mode override. Remove redundant webshopArticle and replace with hint that more articles may be added. Remove multiple calls for SendTransferInitiatorDetails. They should be explained in the Wiki.
Merge pull request #1 from hakito/patch-1

Cleanup eps_start.php
Merge pull request #5 from ThomasLandauer/master

Added explanations and test mode