Bugfixing in test/test_dm.py for Python3
Added pb_blockdev/multipath/__init__.py
Modify setup.py for new submodule pb_blockdev.multipath
Add classes GenericMultipathError and GenericMultipathHandler to pb_blockdev/multipath/__init__.py, add test script test/test_multipath.py
Add pb_blockdev/multipath/system.py
Applied PEP8 rules pb_blockdev/base.py
Add setup.cfg
Bugfixing for Python3 in pb_blockdev/base.py
Applied PEP8 rules pb_blockdev/devices.py
Applied PEP8 rules pb_blockdev/disk
Applied PEP8 rules pb_blockdev/dm.py
Applied PEP8 rules pb_blockdev/hbtl.py
Applied PEP8 rules pb_blockdev/__init__.py
Applied PEP8 rules pb_blockdev/loop.py
Applied PEP8 rules pb_blockdev/multipath/__init__.py
Applied PEP8 rules pb_blockdev/multipath/system.py
Applied PEP8 rules pb_blockdev/multipath/scsi_host.py
Applied PEP8 rules pb_blockdev/multipath/scsi.py
Applied PEP8 rules pb_blockdev/multipath/translate.py
Add method get_paths() in pb_blockdev/multipath/system.py and an appropriate test in test/test_multipath.py