Gpuarray pool grad grad

Fix some failing tests in debugmode

[REG,BUG] Use _props_dict() from the right Op.

CudaNdarray.filter rejects broadcastable dimensions with non-zero
strides

Add Max3dPoolGradGrad which accept 5d input and pools over last 3
dimensions. Also add padding parameter and now accept tensor variables
to make_node which removes necessity to check for constant args. Local
optimization are updated accordingly which now work for 2d and 3d
pooling.

It was using the one from GpuFromHost instead of AdvancedIncSubtensor1.

Fix some problems in float16.

[ENH] fix opt error/skip and better error printing.

Correct blocks/threads for gpuarray CorrMM and Corr3DMM

we do it the normal way now.

Doc: Fix library path. Closes #5156.

Number of blocks and number of threads were swapped.

use floatX in gpuarray dnn tests

Pool 2d rename

Add profiling of which node make_thunk take times.

Issue 5008 fixed

Add bool dtype in scalar and tensor.

Fixed typo in config doc

make var() return float16 when input is float16.

Use "PyArray_Transpose" in gemm implementation

Add a test to test_blas.py:TestBlasStrides to check
is gemm works well with non-contiguous matrices
(A,B,C are all passed as non-contiguous).

All tests passed ! Recall: these are the tests executed:

theano-cache purge && THEANO_FLAGS=blas.ldflags= nosetests theano/tensor/nnet/tests/test_abstract_conv.py:TestAbstractConvNoOptim
theano-cache purge && THEANO_FLAGS=blas.ldflags= nosetests theano/tensor/nnet/tests/test_abstract_conv.py:TestBilinearUpsampling
theano-cache purge && THEANO_FLAGS=blas.ldflags= nosetests theano/tensor/nnet/tests/test_abstract_conv.py:TestCorrConv2d
theano-cache purge && THEANO_FLAGS=blas.ldflags= nosetests theano/tensor/nnet/tests/test_abstract_conv.py:TestCorrConv3d
theano-cache purge && THEANO_FLAGS=blas.ldflags= nosetests theano/tensor/nnet/tests/test_abstract_conv.py:TestCpuConv2d
theano-cache purge && THEANO_FLAGS=blas.ldflags= nosetests theano/tensor/nnet/tests/test_abstract_conv.py:TestCpuConv3d
theano-cache purge && THEANO_FLAGS=blas.ldflags= nosetests theano/tensor/tests/test_blas_c.py
theano-cache purge && THEANO_FLAGS=blas.ldflags= nosetests theano/tensor/tests/test_blas.py
theano-cache purge && THEANO_FLAGS=blas.ldflags= nosetests theano/tensor/tests/test_blas_scipy.py
theano-cache purge && THEANO_FLAGS=optdb.max_use_ratio=10,blas.ldflags= nosetests theano/tensor/nnet/tests/test_corr3d.py
theano-cache purge && THEANO_FLAGS=optdb.max_use_ratio=7,blas.ldflags= nosetests theano/tensor/nnet/tests/test_corr.py