Roll Observatory packages and add a roll script

petitparser/lib/petitparser.dart

Index: petitparser/lib/petitparser.dart
diff --git a/petitparser/lib/petitparser.dart b/petitparser/lib/petitparser.dart
deleted file mode 100644
index 04de1414ac35737ebaa24f74265e4c40d1be5952..0000000000000000000000000000000000000000
--- a/petitparser/lib/petitparser.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-/**
- * This package contains the core library of PetitParser, a dynamic parser
- * combinator framework.
- */
-library petitparser;
-
-part 'src/core/actions.dart';
-part 'src/core/characters.dart';
-part 'src/core/combinators.dart';
-part 'src/core/composite.dart';
-part 'src/core/context.dart';
-part 'src/core/definition.dart';
-part 'src/core/expression.dart';
-part 'src/core/parser.dart';
-part 'src/core/parsers.dart';
-part 'src/core/predicates.dart';
-part 'src/core/repeaters.dart';
-part 'src/core/token.dart';