Added ability to globally set additional curl_setopt

This will allow a user to set additional curl_setopt globally for their env. For instant, when developing locally, a developer might need to set 'CURLOPT_SSL_VERIFYPEER' to false to avoid unsigned ssl errors.
Bug fix for $curlEnvironmentOptions
Updated additional curl options support so it can be unique per request and not a global/static of solution.
Merge pull request #10 from michaelkasper/master

Added ability to set additional curl_setopt