Update composer.json
Merge pull request #3 from zachbadgett/composer-update

Update composer.json
Added certificate_authority to configuration
Always set 'orkestra.ca_bundle.path', overwritten by manual parameter.
Switched guzzle configuration to use internal ssl options instead of setting raw curl settings.
Added test cases
Merge pull request #5 from zachbadgett/feature/config-update

Remove raw curl attributes and replace it with 'ssl.certificate_authority' fixes #4
Added contributing guidelines