added Command Line Arguments, support for directories, hiding private data, not parsing the SDK, rem

pkg/docgen/test/simple/bin/sub_dir/sub_directory.dart

Index: pkg/docgen/test/simple/bin/sub_dir/sub_directory.dart
diff --git a/pkg/docgen/test/simple/bin/sub_dir/sub_directory.dart b/pkg/docgen/test/simple/bin/sub_dir/sub_directory.dart
new file mode 100644
index 0000000000000000000000000000000000000000..65e42770b3ad2d4d08054a0e9cb58e5e196f4ba6
--- /dev/null
+++ b/pkg/docgen/test/simple/bin/sub_dir/sub_directory.dart
@@ -0,0 +1,9 @@
+part of DummyLibrary;
+
+/// Class in dart file in sub-directory. 
+class D {
+  int num;
+  
+  /// Constructor for [D]
+  D(this.num);
+}