nn.Add works with batches
Merge pull request #93 from nicholas-leonard/Add

nn.Add works with batches
removed global variable in LookupTable
Merge pull request #94 from nicholas-leonard/LookupTable

removed global variable in LookupTable
Batchmode is added to SpatialConvmap
Performance improvement to LookupTable
Merge pull request #96 from kaishengtai/fastlookuptable

Performance improvement to LookupTable
Merge pull request #97 from Aysegul/BatchModeFix

Batchmode is added to SpatialConvolutionMap