FIX minor refactoring and code cleaning: _features and reversed list
FIX revert feature sets to classes
FIX pep8 pylint and minor refactoring
ENH cmd line option to select feature set
Merge pull request #18 from moreymat/rst-split-feat-extraction

ENH split+alternative feature extraction code for RST-dep
Merge branch 'master' into rst-dep-fake-root

Conflicts:
	educe/rst_dt/learning/base.py