script to setup mingw-w64 toolchains
reorganize zlib makefile
ignore all compiled windows deps
add comment to script
make sure glib can find zlib
set pkg-config in vendor-rules for mingw-w64
clean up script, create pkg-config as well
fix libtheora compilation with mingw-w64
add creation of cmake toolchain file to mingw-w64 script
find mingw-w64 cmake toolchain file
fix gst-plugins-good not being able to find jpeg headers
don't build wasapi plugin with mingw-w64
support both mingw-w64 (preferred right now) and mxe