Added an import nlinalg to __init__.py for tensor/extra_ops.py

theano/tensor/__init__.py

@@ -16,6 +16,7 @@ from theano.tensor import blas
 from theano.tensor import blas_scipy
 from theano.tensor import blas_c
 from theano.tensor import xlogx
+from theano.tensor import nlinalg
 
 # These imports cannot be performed here because the modules depend on tensor.  This is done at the
 # end of theano.__init__.py instead.