Update svm examples affected by latest API changes.
DOC: Some docstring for libsvm low level API.
Add dtype parameter to CountVectorizer and SparseCountVectorizer.
Revert "DOC: Some docstring for libsvm low level API."

This reverts commit 8e6adc99611c3835cebfd86d3f90b0b636dccd51.
Revert "Update svm examples affected by latest API changes."

This reverts commit 8606d6f010837cd9401941bb19176158fcf43899.
Revert "More accurate info in examples."

This reverts commit 5f9c342549f252bbf517f42e18f0c6650ab5ac71.
Revert "Some fixes for libsvm-dense"

This reverts commit 3e00d98d667d2b54535dad2258c0f67b1fb4923b.
Revert "Update svm benchmark with latests libsvm."

This reverts commit 0bd18900a05e138d19e321258c7fec7fc469bb62.
Revert "Bindings for libsvm-dense"

I'm reverting this series of patches as it needs further testing
(segfaults on some machines).

This reverts commit 11465983d158e3e42e114b137ccd45f88d665caf.
pretifying plot_weighted_classes.py
ENH: enhacements in the gmm module.

     * Use scipy.linalg.solve_triangular if available in
       _lmvnpdf_full, this greatly improves performance.

     * Do not require to set dimensions manually (get them from the
       data or means matrix)
Make previous commit work also with old versions of scipy.
No specific need that matrix is upper-triangular in gmm.
Fix doctests in gmm (skip random ones).

This should be revised at some point ...
Revert "Fix doctests in gmm (skip random ones)."

This reverts commit d40c1ac99b2ddd8008a8a05a9847302e6d65619e.
Revert "No specific need that matrix is upper-triangular in gmm."

This reverts commit 1ca639e0fd7a7ddb2a6033e96d3224728ef0ef58.
Revert "Make previous commit work also with old versions of scipy."

This reverts commit e8d32c67fb024465bc77464c444e5752cecbb3e9.
Revert "ENH: enhacements in the gmm module."

Reverting these commits as they break the hmm module. This is
definitely not my day ...

This reverts commit 88ab266dbd3dfe812d5c83b817621c10e77c159d.
Merge branch 'master' of github.com:scikit-learn/scikit-learn
A few optimizations.