Add helpers functions.

Added helpers functions for Express Checkout & Adaptive Payments classes.

1.2.6: Merge pull request #20 from Misiak4/master

Force SSL TLS v1.2 because PayPal require it.

1.2.5

Add option to use AdaptivePayments through facade.

Removed PayPal::getProvider() null error

1.2.4

Update PayPalFacadeAccessor.php

Removed invalid request error

Removed invalid request error when using guzzle with adaptive payments.

Removed invalid request error

Fixes #15

Remove incorrect config file assignment errors.

1.2.1

Update config.php

1.1.9: Merge pull request #17 from v1shky/master

fix guzzle object to string conversion error

1.1.8

Added exception handling & error response

1.1.7

Merge branch 'adaptive-payments'