ENH: Added support for import libraries created by executable and module...

ENH: Added support for import libraries created by executable and module targets.  The module import libraries should never be used but some windows compilers always create them for .dll files since there is no distinction from shared libraries on that platform.  The executable import libraries may be used to create modules that when loaded bind to symbols from the executables.  This is an enhancement related to bug#4210 though not requested by it explicitly.