FIX: Package seq2seq (#101)

* DOC: Add pip install

* FIX: Include seq2seq in binary package

Author: seanpmorgan

BUILD

@@ -11,6 +11,7 @@ sh_binary(
         "//tensorflow_addons/layers",
         "//tensorflow_addons/losses",
         "//tensorflow_addons/optimizers",
+        "//tensorflow_addons/seq2seq",
         "//tensorflow_addons/text",
     ],
 )

tensorflow_addons/__init__.py

@@ -71,10 +71,12 @@ def _ensure_tf_install():
 del print_function
 
 # Local project imports
+from tensorflow_addons import activations
+from tensorflow_addons import image
 from tensorflow_addons import layers
 from tensorflow_addons import losses
 from tensorflow_addons import optimizers
-from tensorflow_addons import image
+from tensorflow_addons import seq2seq
 from tensorflow_addons import text
 
 from tensorflow_addons.version import __version__