Updated directory structure and build steps

* seperate build-supplemental from build-version
* version.cpp now included in cmake config, not directly imported
* socket moved into its own directory
* test_www removed from project

src/anthracite.hpp

@@ -0,0 +1,4 @@
+#include "backends/backend.hpp"
+
+using namespace anthracite;
+int anthracite_main(int argc, char** argv, backends::backend& be);