FIX: free old structures
WIP: Added BreimanSplitter
WIP: small optimizations
WIP: fix BreimanSplitter
Cleanup
WIP: optimize swaps
Regenerate _tree.c
WIP: some optimizations to criteria
WIP: add -O3 to setup.py
WIP: normalize option for compute_feature_importances
WIP: Added deprecations in tree.py
WIP: updated documentation in tree.py
WIP: added deprecations in forest.py
WIP: updated documentation
WIP: unroll loops
WIP: setup.py
WIP: make sort a function, not a method
WIP: Cleaner Splitter interface
WIP: even cleaner splitter interface
WIP: some optimization in criteria