Added route for custom fields
Handle cases where error is invalid Client ID/Secret and 'error_description' is not supplied
Merge pull request #28 from Dwaynekj/issue/24

Added route for custom fields closes #24
Merge pull request #27 from Dwaynekj/issue/23

Handle cases where error is invalid Client ID/Secret and 'error_descript...

Closes #23
Closes #23. Fixed indentation, reduced complexity, and added missing test case
Merge pull request #31 from ckaznocha/feature/issue23

Closes #23. Fixed indentation, reduced complexity, and added missing tes...
Merge pull request #32 from ckaznocha/develop

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