Move native function declarations to js file

This allows multiple native handlers to load it
as an extension without duplicating all the expected
native function calls names internally.

src/stdlib/native-handler.js

@@ -0,0 +1,94 @@
+var $native = {};
+(function() {
+
+  native function exists();
+  $native.exists = exists;
+
+  native function alert();
+  $native.alert = alert;
+
+  native function read();
+  $native.read = read;
+
+  native function write();
+  $native.write = write;
+
+  native function absolute();
+  $native.absolute = absolute;
+
+  native function list();
+  $native.list = list;
+
+  native function isFile();
+  $native.isFile = isFile;
+
+  native function isDirectory();
+  $native.isDirectory = isDirectory;
+
+  native function remove();
+  $native.remove = remove;
+
+  native function asyncList();
+  $native.asyncList = asyncList;
+
+  native function open();
+  $native.open = open;
+
+  native function openDialog();
+  $native.openDialog = openDialog;
+
+  native function quit();
+  $native.quit = quit;
+
+  native function writeToPasteboard();
+  $native.writeToPasteboard = writeToPasteboard;
+
+  native function readFromPasteboard();
+  $native.readFromPasteboard = readFromPasteboard;
+
+  native function showDevTools();
+  $native.showDevTools = showDevTools;
+
+  native function toggleDevTools();
+  $native.toggleDevTools = toggleDevTools;
+
+  native function newWindow();
+  $native.newWindow = newWindow;
+
+  native function saveDialog();
+  $native.saveDialog = saveDialog;
+
+  native function exit();
+  $native.exit = exit;
+
+  native function watchPath();
+  $native.watchPath = watchPath;
+
+  native function unwatchPath();
+  $native.unwatchPath = unwatchPath;
+
+  native function makeDirectory();
+  $native.makeDirectory = makeDirectory;
+
+  native function move();
+  $native.move = move;
+
+  native function moveToTrash();
+  $native.moveToTrash = moveToTrash;
+
+  native function reload();
+  $native.reload = reload;
+
+  native function lastModified();
+  $native.lastModified = lastModified;
+
+  native function md5ForPath();
+  $native.md5ForPath = md5ForPath;
+
+  native function exec();
+  $native.exec = exec;
+
+  native function getPlatform();
+  $native.getPlatform = getPlatform;
+
+})();