Add transpiler

.gitignore

 .env
+.DS_Store
+._.DS_Store

source/api_reference/gen_doc.sh

 #!/bin/bash
 python gen_doc.py layers --submodules control_flow device io nn ops tensor learning_rate_scheduler detection metric tensor > layers.rst
 
-for module in data_feeder clip metrics executor initializer io nets optimizer param_attr profiler regularizer
+for module in data_feeder clip metrics executor initializer io nets optimizer param_attr profiler regularizer transpiler
 do
   python gen_doc.py ${module} > ${module}.rst
 done

source/api_reference/transpiler.rst

+..  THIS FILE IS GENERATED BY `gen_doc.{py|sh}`
+    !DO NOT EDIT THIS FILE MANUALLY!
+
+================
+fluid.transpiler
+================
+
+.. _api_fluid_transpiler_memory_optimize:
+
+memory_optimize
+---------------
+
+..  autofunction:: paddle.fluid.transpiler.memory_optimize
+    :noindex:
+
+.. _api_fluid_transpiler_release_memory:
+
+release_memory
+--------------
+
+..  autofunction:: paddle.fluid.transpiler.release_memory
+    :noindex:
+
+.. _api_fluid_transpiler_HashName:
+
+HashName
+--------
+
+..  autoclass:: paddle.fluid.transpiler.HashName
+    :members:
+    :noindex:
+
+.. _api_fluid_transpiler_RoundRobin:
+
+RoundRobin
+----------
+
+..  autoclass:: paddle.fluid.transpiler.RoundRobin
+    :members:
+    :noindex:
+