Fix imports for the documentation.

theano/sandbox/cuda/blas.py

@@ -7,8 +7,8 @@ from theano import tensor
 from theano.compat.six import StringIO
 from theano.sandbox.cuda.type import CudaNdarrayType
 from theano.sandbox.cuda import GpuOp
-from theano.sandbox.cuda import as_cuda_ndarray_variable
-from theano.sandbox.cuda.basic_ops import gpu_contiguous
+from theano.sandbox.cuda.basic_ops import (as_cuda_ndarray_variable,
+                                           gpu_contiguous)
 
 
 class GpuDot22(GpuOp):

theano/sandbox/cuda/nnet.py

 from theano import Op, Apply
 from theano.compat.six import StringIO
 
-from theano.sandbox.cuda import GpuOp, as_cuda_ndarray_variable
+from theano.sandbox.cuda import GpuOp
+from theano.sandbox.cuda.basic_ops import as_cuda_ndarray_variable
 
 from theano.sandbox.cuda.kernel_codegen import (nvcc_kernel,
                                                 inline_softmax,