OPPPY-0_1_8 release back to master

[clevelam]

* OPPPY minor release:
    + OPPPY-0_1_8

* Current dependencies:
    + Python 3.X
    + numpy
    + scipy
    + matplotlib
    + h5py
    + sphinx (to build documentation)

* Summary of changes:
    + Added h5py to the test dependencies
    + Update testing
        + Remove unsupported test.support usage
        + Add sanity checks for interactive testing
        + Add Golds for test_output, test_dump_utils, and test_tally
        + Add SHOW_PLOTS test environment variables to hide plots during testing
    + Add Parallel Parsing for outputs, tallies, and dumps (can be disabled using
    OPPPY_USE_THREADS=False environment variable)
    + Add log scale support for 2d contour plots

* Corrected defects:
    + Improve testing robustness
    + Support log scale 2D plotting

* New Features:
    + Parallel parsing (can be disabled with OPPPY_USE_THREADS=False environment variable)

* Known Defects:
    + Not all plotting features have been tested.
    + Only cycle and time data is ignored when listing plot options
    + Dictionary printing options should be fixed