ENH call asarray on returned scores and pvalues
TST ensure SelectKBest and SelectPercentile scores are best
FIX ensure SelectPercentile only removes tied features in case of ties
ENH _BaseFilter.inverse_transform should respect dtype
DOC Fix comment for _BaseFilter.inverse_transform
ENH sparse _BaseFilter.inverse_transform
FIXTST fix errors introduced to feature selection tests
DOC comment feature selection sparse inverse_transform
Merge pull request #1944 from jnothman/selectpercentile_limit_bug

FIX SelectPercentile limit bug
Merge pull request #1935 from jnothman/base_filter_inv_transform

Small improvements to inverse_transform used in feature_selection.