added cuda support for nn.Abs (and added test for it).
added 3 fields to cutorch.getDeviceProperties.
Merge pull request #196 from jonathantompson/cuda_pci_bus_id

added 3 fields to cutorch.getDeviceProperties.
Merge pull request #194 from jonathantompson/abs_module

Added cuda support for nn.Abs (and added a test for it)
completion works with torch superclasses
improve printing recursive tables