Wings-2.1 Released

[dgud]

Yeah 18.1 is a year old :-)
Seriously 18.3 should still work, but I'm constantly fixing things in the erlang when I find stuff
that I need or don't work when developing wings.
More fixes comes in erlang-19.2 as well.

So updating the erlang lib often is good for Wings, wxWidgets-3.0.2 should be fine though.
and isn't that hard either since you have all the packages already installed.

See https://github.com/kerl/kerl for helping building erlang not something I use but many erlang devs use it.