Add config.py for paddle example

examples/paddle/sentiment_bilstm/config.py

@@ -0,0 +1,14 @@
+from paddle.trainer_config_helpers import *
+
+define_py_data_sources2(train_list='train.list',
+                        test_list='test.list',
+                        module="dataprovider",
+                        obj="process")
+
+settings(
+  batch_size=128,
+  learning_rate=2e-3,
+  learning_method=AdamOptimizer(),
+  regularization=L2Regularization(8e-4),
+  gradient_clipping_threshold=25
+)