Add limited net11/net30/net35/net403 support (mostly for NuGet packag…

…es) (#88)

Closes #59

fix strong-naming on not-Windows (#81)

* add strong-named example

* add keyfile to the list of action inputs

* fixup! exes need a Main

Add import_nuget_package (#48)

remove visibility from noncylics (#46)

Fixes: #43

Add runfiles to binary outputs (#35)

This goes towards #9, but doesn't fix it. We still need to deal with how
these files aren't all collected into a single directory.