ENH rename out_dim to n_components in manifold module

doc/modules/manifold.rst

examples/applications/plot_stock_market.py

examples/manifold/plot_compare_methods.py

examples/manifold/plot_lle_digits.py

sklearn/manifold/isomap.py

sklearn/manifold/locally_linear.py

sklearn/manifold/tests/test_isomap.py

sklearn/manifold/tests/test_locally_linear.py