Add dataset to fluid api

doc/fluid/api/data.rst

+==================================
+Data Reader Interface and DataSets
+==================================
+
+..  toctree::
+    :maxdepth: 1
+
+    data/data_reader.rst
+    data/image.rst
+    data/dataset.rst

doc/fluid/api/data/data_reader.rst

+=====================
+Data Reader Interface
+=====================
+
+
+DataTypes
+=========
+
+..  autofunction:: paddle.v2.data_type.dense_array
+    :noindex:
+
+..  autofunction:: paddle.v2.data_type.integer_value
+    :noindex:
+
+..  autofunction:: paddle.v2.data_type.integer_value_sequence
+    :noindex:
+
+..  autofunction:: paddle.v2.data_type.integer_value_sub_sequence
+    :noindex:
+
+..  autofunction:: paddle.v2.data_type.sparse_binary_vector
+    :noindex:
+
+..  autofunction:: paddle.v2.data_type.sparse_binary_vector_sequence
+    :noindex:
+
+..  autofunction:: paddle.v2.data_type.sparse_binary_vector_sub_sequence
+    :noindex:
+
+..  autofunction:: paddle.v2.data_type.sparse_float_vector
+    :noindex:
+
+..  autofunction:: paddle.v2.data_type.sparse_float_vector_sequence
+    :noindex:
+
+..  autofunction:: paddle.v2.data_type.sparse_float_vector_sub_sequence
+    :noindex:
+
+..  autofunction:: paddle.v2.data_type.sparse_non_value_slot
+    :noindex:
+
+..  autofunction:: paddle.v2.data_type.sparse_value_slot
+    :noindex:
+
+..  autoclass:: paddle.v2.data_type.InputType
+    :members:
+    :noindex:
+
+DataFeeder
+==========
+
+..  automodule:: paddle.v2.data_feeder
+    :members:
+    :noindex:
+
+Reader
+======
+
+..  automodule:: paddle.v2.reader
+    :members:
+    :noindex:
+
+..  automodule:: paddle.v2.reader.creator
+    :members:
+    :noindex:
+
+minibatch
+=========
+
+..  automodule:: paddle.v2.minibatch
+    :members:
+    :noindex:

doc/fluid/api/data/dataset.rst

+Dataset
+=======
+
+..  automodule:: paddle.dataset
+    :members:
+    :noindex:
+
+mnist
++++++
+
+..  automodule:: paddle.dataset.mnist
+    :members:
+    :noindex:
+
+cifar
++++++
+
+..  automodule:: paddle.dataset.cifar
+    :members:
+    :noindex:
+
+conll05
++++++++
+
+..  automodule:: paddle.dataset.conll05
+    :members: get_dict,get_embedding,test
+    :noindex:
+
+imdb
+++++
+
+..  automodule:: paddle.dataset.imdb
+    :members:
+    :noindex:
+
+imikolov
+++++++++
+
+..  automodule:: paddle.dataset.imikolov
+    :members:
+    :noindex:
+
+movielens
++++++++++
+
+..  automodule:: paddle.dataset.movielens
+    :members:
+    :noindex:
+
+..  autoclass:: paddle.dataset.movielens.MovieInfo
+    :noindex:
+
+..  autoclass:: paddle.dataset.movielens.UserInfo
+    :noindex:
+
+sentiment
++++++++++
+
+..  automodule:: paddle.dataset.sentiment
+    :members:
+    :noindex:
+
+uci_housing
++++++++++++
+
+..  automodule:: paddle.dataset.uci_housing
+    :members:
+    :noindex:
+
+wmt14
++++++
+
+..  automodule:: paddle.dataset.wmt14
+    :members:
+    :noindex:
+
+wmt16
++++++
+
+..  automodule:: paddle.dataset.wmt16
+    :members:
+    :noindex:

doc/fluid/api/data/image.rst

+Image Interface
+===============
+
+..  automodule:: paddle.v2.image
+    :members:

doc/fluid/api/index_en.rst

@@ -16,3 +16,4 @@ Fluid
     profiler.rst
     regularizer.rst
     io.rst
+    data.rst