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/xml/CMakeLists.txt

@@ -0,0 +1,57 @@
+#############################################################################
+# Name:        build/cmake/lib/xml/CMakeLists.txt
+# Purpose:     CMake file for xml library
+# Author:      Tobias Taschner
+# Created:     2016-09-20
+# Copyright:   (c) 2016 wxWidgets development team
+# Licence:     wxWindows licence
+#############################################################################
+
+include(../../source_groups.cmake)
+
+if(wxUSE_EXPAT STREQUAL "builtin")
+    ExternalProject_Add(wxexpat
+        DOWNLOAD_COMMAND ""
+        SOURCE_DIR ${wxSOURCE_DIR}/src/expat
+        CMAKE_ARGS
+            -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
+            -DBUILD_tools=OFF
+            -DBUILD_examples=OFF
+            -DBUILD_tests=OFF
+            -DBUILD_shared=OFF
+        INSTALL_COMMAND
+            ${CMAKE_COMMAND} --build <BINARY_DIR> --config $<CONFIGURATION> --target install
+        COMMAND
+            ${CMAKE_COMMAND} -E make_directory <INSTALL_DIR>/wxlib
+        COMMAND 
+            ${CMAKE_COMMAND} -E rename 
+                <INSTALL_DIR>/lib/${CMAKE_STATIC_LIBRARY_PREFIX}expat${CMAKE_STATIC_LIBRARY_SUFFIX}
+                <INSTALL_DIR>/wxlib/${CMAKE_STATIC_LIBRARY_PREFIX}wxexpat$<$<CONFIG:Debug>:d>${CMAKE_STATIC_LIBRARY_SUFFIX}
+        )
+    ExternalProject_Get_Property(wxexpat INSTALL_DIR)
+    add_library(expat STATIC IMPORTED)
+    set_target_properties(expat PROPERTIES
+        IMPORTED_LOCATION "${INSTALL_DIR}/wxlib/${CMAKE_STATIC_LIBRARY_PREFIX}wxexpat${CMAKE_STATIC_LIBRARY_SUFFIX}"
+        IMPORTED_LOCATION_DEBUG "${INSTALL_DIR}/wxlib/${CMAKE_STATIC_LIBRARY_PREFIX}wxexpatd${CMAKE_STATIC_LIBRARY_SUFFIX}"
+        FOLDER "Third Party Libraries"
+        )
+    add_dependencies(expat wxexpat)
+    set(EXPAT_INCLUDE_DIRS "${INSTALL_DIR}/include")
+    set(EXPAT_LIBRARIES expat)
+    if(NOT wxBUILD_SHARED)
+        wx_install(
+            FILES ${INSTALL_DIR}/wxlib/${CMAKE_STATIC_LIBRARY_PREFIX}wxexpat$<$<CONFIG:Debug>:d>${CMAKE_STATIC_LIBRARY_SUFFIX}
+            DESTINATION "lib${wxPLATFORM_LIB_DIR}")
+    endif()
+elseif(wxUSE_EXPAT)
+    find_package(EXPAT)
+endif()
+
+wx_append_sources(XML_FILES XML)
+wx_add_library(xml IS_BASE ${XML_FILES})
+wx_lib_link_libraries(xml
+    PRIVATE ${EXPAT_LIBRARIES}
+    )
+wx_lib_include_directories(xml PRIVATE ${EXPAT_INCLUDE_DIRS})
+
+wx_finalize_lib(xml)