Move vcd2svg down into bin
New Makefile.PL
Mostly as generated by h2xs, but:
* SVG is a prerequisite
* ABSTRACT is inline rather than drawn from .pm
Add author email address.
Add $VERSION
Add EXE_FILES and postamble.
Tweak rule to build .svg from .vcd
Ignore generated files Makefile and MYMETA.yml
New file, trivial h2xs-generated t/VCD.t
Ignore more build-crud: blib and pm_to_blib
Obsolete
No need to ignore tmp.svg
Move bifurcation.vcd down into examples/bifurcation/
Move pbj-phylogeny.svg, pbj-phylogeny.tre and pbj.vcd down into examples/pbj
New MANIFEST