Lenet operators

Added backend_cuda for the following operators:

• AvgPooling
• FC/Gemm
• MaxPooling
• ReLU

src/operator/FCImpl_CUDA_kernels.cu

@@ -25,7 +25,7 @@ void fc_forward_cuda_kernel(std::size_t nbInputs, std::size_t inChannels, std::s
             for (std::size_t in = 0; in < inChannels; ++in) {
                 sum += input[batch * inChannels + in] * weights[out * inChannels + in];
             }
-            output[batch * outChannels + out] = sum + (noBias ? 0 : bias[out]);
+            output[batch * outChannels + out] = sum + (noBias ?  0 : bias[out]);
         }
     }
 }