Add ability to upload crash dumps to a central repository

[tkuester]

It would be handy for the application to be able to post a traceback of some sort.

This article may be of some help.

[tkuester]

Until this feature is adopted (which, it may never be...)

Taky creates and appends to {taky.root_dir}/crash.log whenever it crashes unexpectedly. This should be slightly easier for users to generate reports, than scrolling through journalctl and finding it themselves.

Relevant commits:

• cb48b40
• 9cd90b5