sdiagram updates, blockchart, maintenance
Merge branch 'master' of ssh://bitbucket.org/hipertipo/progvis
made color setter relative to default parameters
saving airport work in new color mode for IsoFont (not finished yet)
improvements to isofont and isoglyph (colors) more work on BlockChart (Arbex)
cleaning up examples, tweaks to segmentfont
improvements to blockfont
structuring hDiagram internal methods
draw metrics for first fotn only
moving codefonts to a separate repository + maintenance