Use tempfile module or relative path for job_data_path

[wooyek]

Running this on windows:

python pydio.py -s http://foo.bar -w synced -u foo -p bar -d d:\projekty\pydio\pydio-sync\py\tmp\

Results in an folder creation error

Traceback (most recent call last):
  File "pydio.py", line 72, in <module>
    os.mkdir(job_data_path)
WindowsError: [Error 3] System nie mo┐e odnalečŠ okreťlonej ťcie┐ki: u'data/foobar-synced'     

[cdujeu]

moved to Path.lib