Disabled map server styling in order to use SLD within map layer requests.  Added functions to generate XML SLD styling spectrums and add them to layer requests (currently running off of placeholder, hard-coded values).  Some small CSS changes to the map.
Added a three-color phase shift and moved SLD generation into a function.
Added vars into SLD function so styling can be generated from map request, now supports both 2 and 3 color phases.  Currently to use a 2 color phase the midpoint var must be passed as 'null'.
Split SLD function into three functions (color range, value range and XML string generation).  Added a legend creation function that will generate a small legend using the same style/range object with the color and value range functions.
Fix tests
Fix test
talk to data_mover directly
BCCVLII-199 Remove destination_config.json from data_mover