* 'attachment' of https://github.com/jasonob/go-jira:
Increase test coverage slightly and add some robustness
Add test cases for DoNoClose()
Add test cases for PostAttachment() and DownloadAttachment(). Fix PostAttachment() to handle response as a JSON array of Attachments. Add Author *Assignee and Thumbnail definition to Attachment structure. Clarify comments on DoNoClose() call
Ensure Authenticated test validates the path where the AuthenticationService hasn't been initialized
Moved Authentication() test into AuthenticationService, and add test case to validate it operates correctly
* Add ability to add and download attachments, including multi-part form handling * Add method to report if the current session is authenticated or not
