Add convenient method for obtaing nested view
Added get_description function for jobs

Obvious function for getting description of job wasn't exist.
Merge pull request #83 from Sicness/get_job_description

Added get_description function for jobs
Merge pull request #77 from vjuranek/api_nested_view

Add convenient method for obtaing nested view
Merge pull request #84 from x746e/master

Changed View.add_job() to actually add job to the view, rather than replace all jobs in the view by that job.