Initial commit
Add operations module
Improve doc
Set O_NONBLOCK on stderr too
Use operations module + implement save/delete methods
Store started_on/finished_on
Add url field
Fix view name
Add Meta info to Process class
Add Admin registration
Define verbose name
Make source, operation and parameters editable
Use FilePathField for source specification
Define fields parameters for admin form
Remove unused code
Reset task_id upon termination/cancellation
Modify comments
Dynamically load modules
Cancel only CREATED or STARTED tasks
Fix operation list retrieval