Modify helper functions

Modify helper functions for ImageManipulatorDimensionReducer to minimize redunant code.
Add helper functions

Add helper functions to minimize redundant code.
Merge remote-tracking branch 'origin/gh-pages' into gh-pages

Conflicts:
	python_scripts/image_manipulator_dimension_reducer.py
Update notebook to include SAXS Equations

Update notebook to contain information about how to get an
autocorrelation for a local state from SAXS intensities and volume
fraction