WIP: Moved sources int src/, separated most of the source code from Perl.

The XS was left only for the unit / integration tests, and it links
libslic3r only. No wxWidgets are allowed to be used from Perl starting
from now.

src/boost/CMakeLists.txt

@@ -0,0 +1,20 @@
+project(nowide)
+cmake_minimum_required(VERSION 2.6)
+
+add_library(nowide STATIC
+    nowide/args.hpp
+    nowide/cenv.hpp
+    nowide/config.hpp
+    nowide/convert.hpp
+    nowide/cstdio.hpp
+    nowide/cstdlib.hpp
+    nowide/filebuf.hpp
+    nowide/fstream.hpp
+    nowide/integration/filesystem.hpp
+    nowide/iostream.cpp
+    nowide/iostream.hpp
+    nowide/stackstring.hpp
+    nowide/system.hpp
+    nowide/utf8_codecvt.hpp
+    nowide/windows.hpp
+)