Initial cut of start compiler and interpreter

bin/start.dart

@@ -0,0 +1,38 @@
+library start;
+
+import 'dart:io';
+import 'package:args/args.dart';
+
+import 'startc/startc.dart';
+import 'starti/starti.dart';
+
+ArgResults options() {
+  final options = new Options();
+  final argv = options.arguments;
+
+  final parser = new ArgParser();
+  parser.addFlag('debug', help: 'Print debugging info', defaultsTo: false);
+  parser.addFlag('show', help: 'Print IR', defaultsTo: false);
+  parser.addFlag('run', help: 'Execute code', defaultsTo: true);
+  parser.addFlag('stats', help: 'Show stats', defaultsTo: false);
+  return parser.parse(argv);
+}
+
+void main()
+{
+  final args = options();
+  if (args.rest.length != 1)
+    throw 'Filename expected';
+  final filename = args.rest[0];
+
+  final file = new File(filename);
+  final input = file.readAsStringSync();
+  final output = compile(input);
+  if (args['show'])
+    print(output);
+  if (args['run']) {
+    final stats = execute(output, debug: args['debug']);
+    if (args['stats'])
+      print('\n$stats');
+  }
+}