Add tasklog model
Bugfix: Don't try to unpack task_log relationships
GET and POST for task log index API
Bugfix in task logs index
Fix Task API again
Send the attempt of tasks in assignments
Implement API for handling task logfiles
Try to fix mysql build failure
Another attempt at fixing mysql build failures
Bugfix: Import CREATED symbol
Accept CSV input

Needed for task logfiles
Bugfix: attempt -> attempts
Add logging to PUT for logfiles
Catch exceptions when writin logfile
Catch OSError as well
Rename logfiles environment variable

The previous name PYFARM_AGENT_LOGFILES_DIR was slightly ambiguous. It
suggested that it was a setting intended for the agent, which just isn't
true.
Return CREATED when logfile has been registered
Add docstrings to tasklogs API
Docstring fix
More information in error messages