reference or raw matrix (Matrix & or Matrix *)
contextProjectionForward
contextProjectionBackward
contextProjectionBackwardData
contextProjectionBackwardWeight
classificationError
The mul functions would be updated later.

* The DataProvider should be INCREF every time.

Change-Id: I2b58c8d854aa31096a6b6e49c1c120f7acec622b

Make sure the input size is correct.

Change-Id: I2559075e32a098c5ed51942ff8351d964a6d6c75

Change-Id: I2b58c8d854aa31096a6b6e49c1c120f7acec622b

Make sure the input size is correct.

Change-Id: I2559075e32a098c5ed51942ff8351d964a6d6c75

* Also fix a protential bug in WarpCTCLayer.cpp

Also fix compile issues

* But not reproduce the problem.

When the define_py_data_sources2 has both train_list and test_list,
for job=test, the trainer will create both dataProvider_ and testDataProvider_.
But dataProvider_ is not used. This causes SIGSEGV at finishAsync() because asyncLoader_ is not created.

Change-Id: If579f715f80a70ebc795094792c3436bfa0f5746

Added a test in test_NetworkCompare to verify cudnn and exconv, fixed a bug in cudnn_conv in dealing with groups

* Different Type compare.
* ostream << should pass a const object.
* remove always true checks.

* Different Type compare.
* ostream << should pass a const object.
* remove always true checks.