Add CMake build system

Add CMake build system for libraries, tests and samples
update_files.py converts build/files into CMake format.
build/update-setup-h has been modified to update build/cmake/setup.h.in.

build/cmake/lib/zlib.cmake

@@ -0,0 +1,41 @@
+#############################################################################
+# Name:        build/cmake/lib/zlib.cmake
+# Purpose:     Use external or internal zlib
+# Author:      Tobias Taschner
+# Created:     2016-09-21
+# Copyright:   (c) 2016 wxWidgets development team
+# Licence:     wxWindows licence
+#############################################################################
+
+wx_add_thirdparty_library(wxUSE_ZLIB ZLIB "use zlib for LZW compression"
+    DEFAULT_APPLE sys)
+
+if(wxUSE_ZLIB STREQUAL "builtin")
+    wx_add_builtin_library(wxzlib
+        src/zlib/adler32.c
+        src/zlib/compress.c
+        src/zlib/crc32.c
+        src/zlib/deflate.c
+        src/zlib/gzclose.c
+        src/zlib/gzlib.c
+        src/zlib/gzread.c
+        src/zlib/gzwrite.c
+        src/zlib/infback.c
+        src/zlib/inffast.c
+        src/zlib/inflate.c
+        src/zlib/inftrees.c
+        src/zlib/trees.c
+        src/zlib/uncompr.c
+        src/zlib/zutil.c
+    )
+    if(WIN32)
+        # Define this to get rid of many warnings about using open(),
+        # read() and other POSIX functions in zlib code. This is much
+        # more convenient than having to modify it to avoid them.
+        target_compile_definitions(wxzlib PRIVATE _CRT_NONSTDC_NO_WARNINGS)
+    endif()
+    set(ZLIB_LIBRARIES wxzlib)
+    set(ZLIB_INCLUDE_DIRS ${wxSOURCE_DIR}/src/zlib)
+elseif(wxUSE_ZLIB)
+    find_package(ZLIB REQUIRED)
+endif()