Revamped the scaling of the gear. This hopefully fixes
https://github.com/jnweiger/inkscape-gears-dev/issues/5
https://github.com/jnweiger/inkscape-gears-dev/issues/14

My silly metric_hack is no longer needed.
working on https://github.com/jnweiger/inkscape-gears-dev/issues/6#issuecomment-39626732
Positions are perfect now, but the upper half of the geometry is bogus.
Manually merged https://github.com/jnweiger/inkscape-gears-dev/pull/15
Ring gear looks good. Thanks!
fixed https://github.com/jnweiger/inkscape-gears-dev/issues/6
A proper warning with helpful hints added, to allow the user
to avoid undercut issues. Rack gears are especially prone
to undercuts, but this is not an issue specific to racks. Closed fixed here.
Merge branch 'master' of git://github.com/Neon22/inkscape-gears-dev into Neon22-master

Conflicts:
	actual-gear-measurements.txt
	gears-dev.inx
	gears-dev.py