MAINT HonestForestClassifier now has bootstrap=True as the default. And removing old MIGHT code

[adam2392]

Fixes #146

Changes proposed in this pull request:

• bootstrap=True is the default now
• Removed all instances of FeatureImportanceClassifier and other MIGHT methods that are outdated. This is in favor of the functional API used for (CO)MIGHT
• There was a small bug in build_coleman_forest stemming from MAINT Fix CI #281 and ENH treeple tutorials should use native functions in scikit-tree #257 where the PermutationHonestForest should get passed covariate_index. It is not tested in test_comight_repeated_feature_sets.

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[sampan501]

LGTM!

[sampan501]

Pending unit test pass

[adam2392]

This will get refactored to use the latest API