Show response instead of request in ExecutePayment
Fix path in bootstrap for samples when installed via composer

When installing the SDK as recommended via composer, the samples don't work because it can not find the autloader of composer
Minor fix of previous commit
Merge commit '9d5d0beb57227cc31f1072ad37ddea57f6ea71b7'

Conflicts:
	sample/payments/ExecutePayment.php
Merge pull request #35 from hakito/master

Samples missing vendor folder in error because it cannot locate the autoload.php