support for coupons endpoint
Merge pull request #29 from saranyan/master

Support for coupons endpoint
Make the Packagist link more prominent in README
Add link to Bigcommerce/Api on Packagist
Reset CURLOPT_CUSTOMREQUEST before each new request method.

This avoids issues with the state crossing over multiple requests, as cURL treats this field
as more authoritative than CURLOPT_POST, etc...
Merge pull request #30 from maetl/curlopt-custom-request

Reset CURLOPT_CUSTOMREQUEST before each new request method.
Merge remote-tracking branch 'upstream/master'