Bugfix: If you make a GET request after a PUT request you still have the PUT value for CURLOPT_CUSTOMREQUEST, causing an error.
I have forced CURLOPT_CUSTOMREQUEST to 'GET' on get requests to avoid header overriding.
Use $_PUT variable in tests
Use both $_PUT and $_PATCH variable in tests
Merge branch 'master' of https://github.com/gotardo/php-curl-class into gotardo-master

* 'master' of https://github.com/gotardo/php-curl-class:
  Bugfix: If you make a GET request after a PUT request you still have the PUT value for CURLOPT_CUSTOMREQUEST, causing an error. I have forced CURLOPT_CUSTOMREQUEST to 'GET' on get requests to avoid header overriding.
Fix #22: Include CURLOPT_CUSTOMREQUEST to override any existing request method