ENH: Make doctests pass with numpy tester.

scikits/learn/datasets/base.py

scikits/learn/glm/ridge.py

scikits/learn/gmm.py

scikits/learn/grid_search.py

scikits/learn/hmm.py

scikits/learn/naive_bayes.py

scikits/learn/neighbors.py

scikits/learn/pca.py

scikits/learn/pipeline.py

scikits/learn/svm.py

scikits/learn/utils/graph.py