rename ddc -> dev_compiler, fixes #84

lib/devc.dart

Index: lib/devc.dart
diff --git a/lib/devc.dart b/lib/devc.dart
index 6c28d6412a562de061b1d15bd4581c5f7afc4d67..0e8e005ad9f56c1659d14950d31f5c731b62fc2e 100644
--- a/lib/devc.dart
+++ b/lib/devc.dart
@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Command line tool to run the checker on a Dart program.
-library ddc.devc;
+library dev_compiler.devc;
 
 import 'dart:async';
 import 'dart:convert';
@@ -169,5 +169,5 @@ CheckerResults _compileDart(
   return new CheckerResults(libraries, rules, failure || options.forceCompile);
 }
 
-final _log = new Logger('ddc');
+final _log = new Logger('dev_compiler');
 final _earlyErrorResult = new CheckerResults(const [], null, true);