Windows: unicode command line

compiler/main.v

@@ -193,6 +193,7 @@ fn (v mut V) compile() {
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
+#include <shellapi.h>
 #include <io.h> // _waccess
 #include <fcntl.h> // _O_U8TEXT
 #include <direct.h> // _wgetcwd

compiler/msvc_win.v

@@ -6,6 +6,7 @@ import os
 #flag windows @VROOT/thirdparty/microsoft_craziness/microsoft_craziness.o
 #flag windows -l ole32
 #flag windows -l oleaut32
+#flag windows -l shell32
 
 // Emily: If these arent included then msvc assumes that 
 // these return int (which should be 64bit)

vlib/os/os.v

@@ -93,8 +93,17 @@ fn todo_remove(){}
 
 fn init_os_args(argc int, argv *byteptr) []string {
 	mut args := []string
-	for i := 0; i < argc; i++ {
-		args << string(argv[i])
+	$if windows {
+		mut args_list := &voidptr(0)
+		mut args_count := 0
+		args_list = C.CommandLineToArgvW(C.GetCommandLine(), &args_count)
+		for i := 0; i < args_count; i++ {
+			args << string_from_wide(&u16(args_list[i]))
+		}
+	} $else {
+		for i := 0; i < argc; i++ {
+			args << string(argv[i])
+		}		
 	}
 	return args
 }