added gstreamer config.h file modified from cygwin's generated file
moved solutions to own directory, changed output directories
added sqlite, libxml2, zlib, and pthreads source instead of an external reference to wincairo
added libiconv
added iconv.h
added libffi
added ffi configuration headers
fixed ffitarget.h error
build more of glib, make it a dll
build zlib
build libffi, link to libffi and zlib