Add manifest template and make sure all sub dirs are being included

MANIFEST

@@ -11,6 +11,29 @@ rivets/paths.py
 rivets/server.py
 rivets/utils.py
 rivets/version.py
+rivets/assets/__init__.py
+rivets/assets/asset.py
+rivets/assets/asset_attributes.py
+rivets/assets/bundled_asset.py
+rivets/assets/processed_asset.py
+rivets/assets/static_asset.py
+rivets/caching/__init__.py
+rivets/caching/file_store.py
+rivets/engines/__init__.py
+rivets/engines/registry.py
+rivets/mime/__init__.py
+rivets/mime/registry.py
+rivets/processing/__init__.py
+rivets/processing/charset_normalizer.py
+rivets/processing/cssmin_compressor.py
+rivets/processing/directive_processor.py
+rivets/processing/processor.py
+rivets/processing/registry.py
+rivets/processing/rjsmin_compressor.py
+rivets/processing/safety_colons.py
+rivets/processing/slimit_compressor.py
+rivets/processing/slimmer_compressors.py
+rivets/processing/uglipyjs_compressor.py
 test/test_asset.py
 test/test_asset_attributes.py
 test/test_caching.py

MANIFEST.in

@@ -0,0 +1 @@
+recursive-include rivets *.py