create MP instance and change MPextensions to MPdefinitions
divide module into MkII and MkIV
code clean up and use Adityas filter module
add tests
remove probing for gnuplot binary and available terminals
add test: overprinting of text labels and tics placement
implement standalone option (add startGNUPLOTpage)
add support for gnuplot “font” directive
improve and fix test: overprinting of text labels and tics placement
add .gitignore
implement charsize calculation for TikZ terminal
normalise naming of counters and dimensions
fix documentation for \processGNUPLOTfile
implement fontscale parameter