Removing debug output and unnecessary output.

RELEASE 0.4.4

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Support for fetching attachments and rendering them to markdown.

* Tightening timeout

* Denoise the output
* Adding a progress bar
* Fix exceptions to contain http status
* Improving readme

Bumping up version number.

Fixing error handling around 404

* Adding formatting utility `jira-format-issues`

* Improved error messages