Improvements to plotting esp GIV

GIV updates

# Conflicts:
#	jupyter_notebooks/Spectral_Unmixing_1pos_1spec.ipynb
#	jupyter_notebooks/Spectral_Unmixing_2pos_1spec.ipynb
#	pycroscopy/processing/process.py

Cades dev

# Conflicts:
#	examples/plot_multidimensional_data.py
#	jupyter_notebooks/Spectral_Unmixing_1pos_1spec.ipynb
#	jupyter_notebooks/Spectral_Unmixing_2pos_1spec.ipynb
#	pycroscopy/io/hdf_utils.py

Labels now returned in same order as dimensions in data
New parameter sort_dims.  If true, the dimensions are returned in order of fastest varying to slowest.

# Conflicts:
#	pycroscopy/io/hdf_utils.py
#	pycroscopy/io/translators/beps_data_generator.py