pad and via sizes from those settings when diameter is not given
in the local object. Calculation algorithms are inferred from the
UI help of the Eagle program.
For edge connector type of footprints, some copper pads can be on the
back side even within packages.
Flipping of packages to back was not being done correctly, but I think this
is working now.
There are still remaining issues with text positioning that I am working on.
* Derive the pcbnew copper zone and non-copper zone dialog windows from DIAG_SHIM,
which injects some template code.
* Update UIpolicies.txt to talk about DIALOG_SHIM support.
* Add zone support to eagle_plugin.
* Organize ZONE_CONTAINER class declaration for future privacy and accessors.