More CMake work:

- various fixes for using CMake on Windows
- support building external SDL, zlib, CLRun, wxWidgets
- support using precompiled GLew and WiiUse libs on Windows

For what it's worth, I'm not quite sure if I got all the wx files right...
Building with MSVC2008 still doesn't work yet, but is a lot closer now.


git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6361 8ced0084-cf51-0410-be5f-012b33b47a6e

Externals/zlib/CMakeLists.txt

@@ -0,0 +1,14 @@
+set(SRCS	adler32.c
+			compress.c
+			crc32.c
+			deflate.c
+			gzio.c
+			infback.c
+			inffast.c
+			inflate.c
+			inftrees.c
+			trees.c
+			uncompr.c
+			zutil.c)
+
+add_library(z STATIC ${SRCS})