modified separable filter
normalized box filter (hannes changed)
export hog commented out
removed tuplewise_spatial_op
added op for spatial norm
implemented separable filters with kernel param
test for separable filter
added theano ops flip_dim2and3 and shuffle_dim
deleted spatial op and implemented in cuvnet
flipping dimensions works
bug fixed in flipdim2and3
added test for theano ops
fixed the bug in reshape unsigned int
flipping is done for any dimension
parameter for flipping changed to cuv::extents
matrix_op_vec works for all axis
removed tuplewise_spatial_op
added eps param for the test tuplewise_op
modified documentation for tuplewise op, and deleted spatial_op
added eps param for tuplewise op, gradient fixed