updated the Manifest file

Manifest.txt

@@ -3,7 +3,6 @@ Manifest.txt
 README.txt
 Rakefile
 grit.gemspec
-lib/grit.rb
 lib/grit/actor.rb
 lib/grit/blob.rb
 lib/grit/commit.rb
@@ -11,12 +10,26 @@ lib/grit/commit_stats.rb
 lib/grit/config.rb
 lib/grit/diff.rb
 lib/grit/errors.rb
+lib/grit/git-ruby/commit_db.rb
+lib/grit/git-ruby/file_index.rb
+lib/grit/git-ruby/git_object.rb
+lib/grit/git-ruby/internal/loose.rb
+lib/grit/git-ruby/internal/mmap.rb
+lib/grit/git-ruby/internal/pack.rb
+lib/grit/git-ruby/internal/raw_object.rb
+lib/grit/git-ruby/object.rb
+lib/grit/git-ruby/repository.rb
+lib/grit/git-ruby.rb
 lib/grit/git.rb
+lib/grit/head.rb
 lib/grit/index.rb
 lib/grit/lazy.rb
 lib/grit/ref.rb
 lib/grit/repo.rb
+lib/grit/status.rb
+lib/grit/tag.rb
 lib/grit/tree.rb
+lib/grit.rb
 test/fixtures/blame
 test/fixtures/cat_file_blob
 test/fixtures/cat_file_blob_size