v0.3.6

1. :class:monty.tempfile.ScratchDir_ now checks for existence of root
   directory. If root path does not exist, will function as simple
   pass through. Makes it a lot more robust to bad mounting of scratch
   directories.

v0.3.5

1. Added backport of functools.lru_cache.

Minor update with get_cpu method.

1. Added get_ncpus method in dev. (G. Matteo).