Added new string template formatter

- Based on a template formatter I have in used/evolved in other projects.
- Will eventually replace the current token formatter used in untyped code.
- Has some x86 simd support.. (opt-in if avail).

gen_singleheader/singleheader.cpp

@@ -81,6 +81,7 @@ int gen_main()
 			Code printing     = scan_file( path_base "dependencies/printing.hpp" );
 			Code containers   = scan_file( path_base "dependencies/containers.hpp" );
 			Code hashing 	  = scan_file( path_base "dependencies/hashing.hpp" );
+			Code simd         = scan_file( path_base "dependencies/simd.hpp" );
 			Code strings      = scan_file( path_base "dependencies/strings.hpp" );
 			Code filesystem   = scan_file( path_base "dependencies/filesystem.hpp" );
 			Code timing       = scan_file( path_base "dependencies/timing.hpp" );
@@ -97,6 +98,7 @@ int gen_main()
 			header.print( printing );
 			header.print( containers );
 			header.print( hashing );
+			header.print( simd );
 			header.print( strings );
 			header.print( filesystem );
 			header.print( timing );