some reorganization

(moved pretty much everything that relates to scope in scope.js, added a
module for NodeJS that can be used with require() and exports everything.)

tools/node.js

@@ -0,0 +1,37 @@
+var fs = require("fs");
+var vm = require("vm");
+var sys = require("util");
+var path = require("path");
+
+var UglifyJS = vm.createContext({});
+
+function load_global(file) {
+    file = path.resolve(path.dirname(module.filename), file);
+    try {
+        var code = fs.readFileSync(file, "utf8");
+        return vm.runInContext(code, UglifyJS, file);
+    } catch(ex) {
+        // XXX: in case of a syntax error, the message is kinda
+        // useless. (no location information).
+        sys.debug("ERROR in file: " + file + " / " + ex);
+        process.exit(1);
+    }
+};
+
+load_global("../lib/utils.js");
+load_global("../lib/ast.js");
+load_global("../lib/parse.js");
+load_global("../lib/scope.js");
+load_global("../lib/output.js");
+load_global("../lib/compress.js");
+
+UglifyJS.AST_Node.warn_function = function(txt) {
+    sys.debug(txt);
+};
+
+// XXX: perhaps we shouldn't export everything but heck, I'm lazy.
+for (var i in UglifyJS) {
+    if (UglifyJS.hasOwnProperty(i)) {
+        exports[i] = UglifyJS[i];
+    }
+}