Merge branch 'release/v0.0.4' into develop
Changed priorities in FUTUREWORK.md.
Cleanup of documentation. Fix for CRTLearner default options.
Updated FUTUREWORK to indicate development of feature selection in another library and variant implementation of split-apply-combine.
Cleaned up FUTUREWORK.
Added gitignore.
Rename of test runner.
Removal of Match dependency. Update to conform to new MLBase API.
Restructure nested_dict_to_list to nested_dict_to_tuples.
Use of StatsBase over Stats package.
Removal of Fixtures package dependency.
Rename of HAS_* to LIB_*_AVAILABLE.
Increased test coverage.
Update travis config.
Fix for coveralls in travis config.
Patch scikit-learn test.
Removal of Radius Nearest Neighbor in scikit-learn.
Revert "Removal of Radius Nearest Neighbor in scikit-learn."

This reverts commit f38df92bdcea2c8ae9c236f3db95a67a8a7d1987.
More seed fixing in scikit-learn tests.
Generalized tests in scikit-learn. Code cleanup in system.jl