Changes in 2.0

Enhancements

Can reproduce the algorithm in Woerd and Wernand 2015 by:
- Including the Forel-Ule colour calibration from Novoa et al. 2013: fucalibration argument to calc_ForelUle_image
- Including Hue angle correction for olci, modis, meris and seawifs sensors with sensorcorr argument to calc_ForelUle_image
  fucalibration='data/hue_angle_limits_WW2010.csv'
Added test notebooks Test_FU and Test_FU_image complete with synthethic point data (IOCCG) and section of S3 OLCI satellite image for Liverpool Bay.
Added option for other Colour Matching functions with cmf argument to calc_ForelUle_image.
Added generator for Forel Ule colormap from Wernand's thesis: forelulecmap()

No pending issues