update the Makefile and ios-configure to support iphonesimulator-x86_64 builds
for both libz and libspdylay
simplify the Makefile by defining a function to build spdylay
simplify the Makefile by using a function to compile libz
Makefile tweaks in preparation for bringing back macosx builds
get zlib building for macosx again (i386 and x86_64)
split up the Makefile into two other files, Makefile.zlib and Makefile.spdylay
split up the PKG_CONFIG_PATH into platform specific versions in the Makefile
fix the pkgconfig stuff for zlib
get spdylay compiling for macosx again
Makefile tweaks for the local target