Implemented basic options support for compressor and comments.

Example use:
var result = UglifyJS.minify([files...], {
	compressor: {
		warnings:false
	},
	// https://github.com/mishoo/UglifyJS2#keeping-copyright-notices-or-other-comments
	comments:true  // false, true or "all"
});

tools/node.js

@@ -62,12 +62,45 @@ for (var i in UglifyJS) {
     }
 }
 
-exports.minify = function(files, options) {
+exports.minify = function(files, options)
+{
     options = UglifyJS.defaults(options, {
         outSourceMap : null,
         inSourceMap  : null,
         warnings     : false,
+        compressor   : null,
+        output       : null,
+        comments: false
     });
+    
+    var compressorOptions =  UglifyJS.defaults(options.compressor, {
+    	warnings : false
+    });
+    
+    var outputOptions = UglifyJS.defaults(options.output, {
+    	comments: false,
+    	beautify: false
+    });
+    
+    // Got comment option?
+    if (options.comments) {
+	    if (/^\//.test(options.comments)) {
+	        outputOptions.comments = new Function("return(" + options.comments + ")")();
+	    } else if (options.comments == "all") {
+	        outputOptions.comments = true;
+	    } else {
+	        outputOptions.comments = function(node, comment) {
+	            var text = comment.value;
+	            var type = comment.type;
+	            if (type == "comment2") {
+	                // preserved multiline comments
+	                 return /License|license|@preserve|@license|@cc_on/i.test(text);
+	            }
+	        }
+	    }
+	}
+
+    
     if (typeof files == "string")
         files = [ files ];
 
@@ -83,9 +116,11 @@ exports.minify = function(files, options) {
 
     // 2. compress
     toplevel.figure_out_scope();
-    var sq = UglifyJS.Compressor({
+    
-        warnings: options.warnings,
+    // Toplevel warnings override
-    });
+    if(options.warnings) compressorOptions.warnings = true;
+    
+    var sq = UglifyJS.Compressor(compressorOptions);
     toplevel = toplevel.transform(sq);
 
     // 3. mangle
@@ -103,7 +138,11 @@ exports.minify = function(files, options) {
         file: options.outSourceMap,
         orig: inMap
     });
-    var stream = UglifyJS.OutputStream({ source_map: map });
+    
+    // Add sourcemap to output options
+    outputOptions.source_map = map;
+    
+    var stream = UglifyJS.OutputStream(outputOptions);
     toplevel.print(stream);
     return {
         code : stream + "",