Update samples/DirectPayment/DoDirectPayment.php

Missing PaymentAction
Without this option, all transactions are treated as Sale
Merge pull request #5 from diemuzi/patch-1

Update samples/DirectPayment/DoDirectPayment.php
Updated ipn sandbox endpoint
is_array condition check interchanged
Update lib/PPCredentialManager.php

MissingCredentialException() does not exist
Replaced with PPMissingCredentialException
Merge pull request #7 from diemuzi/patch-2

Update lib/PPCredentialManager.php
Merge remote branch 'origin/master' into autoload
Merge remote branch 'origin/master' into correct-require
Merge remote branch 'origin/master' into endpoint-auth

Conflicts:
	config/sdk_config.ini
Merge remote branch 'origin/master' into config-load
Merge branch 'endpoint-auth' into staging
Merge branch 'config-load' into staging
Merge branch 'autoload' into staging

Conflicts:
	tests/PPCertificateCredentialTest.php
	tests/PPSignatureCredentialTest.php
Merge remote branch 'rrehbeindoi/staging' into staging