fixing #1868 Misc accumulated fixes

Fix crash at import

Revert "Fixed dependencies for theano.sandbox.cuda import"

new citation policy

Fixed dependencies for theano.sandbox.cuda import

Opt

Make automatic insertions of dnn_conv() use the optimal cuDNN code path (2)

Annotate ConvOp and GpuConv with direction hint and use this to select algorithm in conv_dnn optimizer

Remove warning caused by AdvancedSubtensor.infer_shape.

This just remove warning and to not implement the case where the
warning was generated.

Make automatic insertions of dnn_conv() use the optimal cuDNN code path

padding support for dnn_conv

Allow opt registered in name EquilibriumDB to do not be enable by the EquilibrumDB name and use that for local_remove_all_assert opt.

Make opt local_adv_sub1_adv_inc_sub1 add assert to don't loose error and document how to get rid of them