TST better coverage in kernel_approximation
FIX spectral_embedding test erros, ADD spectral embedding to sphere examples
FIX: fixed random_state for heisen doctest failure in multiclass module
set min_density when growing deep trees during gradient boosting
ENH input validation only in ``fit`` in LassoLarsIC, check that error is raised.
TST document and test verbosity parameter of lars_path
TST some more tests for SGDClassifier input validation
ENH / TST better coverage of supervised clustering metrics, slight cleanup
DOC make unit test requirements a bit stricter. 80% is sub-par with current code-base
COSMIT pep8
COSMIT renaming chunk_size to batch_size in MiniBatchDictionaryLearning and MiniBatchSparsePCA
DOC add rename to whatsnew
Merge pull request #1468 from erg/random-failures-12345

Fix two random failures in test_common without setting np.random.seed()
Delete iris.dot in tree.rst doctest
FIX: seed blobs dataset to have a stable spectral clustering under OSX 10.8
cosmit pep8
Merge pull request #1478 from amueller/pep8

WIP cosmit pep8
Merge pull request #1451 from amueller/chunksize_batchsize_rename

MRG renaming chunk_size to batch_size in MiniBatchDictionaryLearning
Merge pull request #1470 from kuantkid/fix_spectral_cluster_test

FIX spectral clustering test error in OSX and ADD spectral embedding to sphere examples
Add comment in test_spectral_clustering_sparse