rename ddc -> dev_compiler, fixes #84

bin/devc.dart

 #!/usr/bin/env dart
 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Command line tool to run the checker on a Dart program.
-library ddc.bin.checker;
+library dev_compiler.bin.checker;
 
 import 'dart:io';
 
 import 'package:dev_compiler/devc.dart';
 import 'package:dev_compiler/src/checker/dart_sdk.dart' show mockSdkSources;
 import 'package:dev_compiler/src/checker/resolver.dart' show TypeResolver;
 import 'package:dev_compiler/src/options.dart';
 
 void _showUsageAndExit() {
   print('usage: dartdevc [<options>] <file.dart>\n');
@@ skipping 19 matching lines @@
   }
 
   if (!options.dumpInfo) setupLogger(options.logLevel, print);
 
   var typeResolver = options.useMockSdk
       ? new TypeResolver.fromMock(mockSdkSources, options)
       : new TypeResolver.fromDir(options.dartSdkPath, options);
   var result = compile(options.entryPointFile, typeResolver, options);
   exit(result.failure ? 1 : 0);
 }