updated todo
fill between: improved option processing such that it supports legends
added test
fixed bug in fillbetween
fill between: sorted  intersection solutions for 'split'
added test
fixed bug in xelatex driver for shader=faceted interp
added test
intersection lib: ensured that the returned time is always present
refactoring: softclip renaming of internal macros
fillbetween: fixed bug with soft clipping (failed if the first point was on the clip path)
added test
adopted gitignore
added missing reference revs
added test