Updated documentation
General refactoring
Moved 'simple case' handling up to top level
Utility class for rgb 2 lab transformations.
Renamed struct to config
Wavelet decomposition of channels independently.
short TODO
Added non-directional a_trous
inverse wavelet decomposition by channel
Switched to DWD wavelet decomposition
Documentation
Added some TODOs
wavelet decomposition support for new data cell
Refactored to process new data structure
Documentation
Simplified J&W input
More readable variable names
Placeholder normalized Lab colorspace functions
Corrected initial x and y

Updated input x (excitation) and y (inhibition) initialization data
structure.
Extracted normalize(), calculate_xy()