Merge branch 'hotfix/0.1.2' into develop
issue #25 removed all php closing tags
updated README by removing deprecated functions such as setTestmode, setMerchantIdbasedAuthorization and setPasswordBasedAuthorization.
added validation on vat as int
fix for validation on CompanyName in DE and relativeDiscount calculation on higher quantaty on same product.
added test for DE identity
Merge branch 'release/0.1.3'