Update text features to new API. Various bug fixes and additional tests. Coverage at 81%
Drop compute_importances, deprecated since scikit_learn 0.14
Readme formatting
Bugfixes for simple metric reporter
Consistent threshold handling
Metric naming
Merge remote-tracking branch 'kvh/master'

* kvh/master:
  Metric naming
  Consistent threshold handling
  Bugfixes for simple metric reporter
  Readme formatting
  Drop compute_importances, deprecated since scikit_learn 0.14
  Update text features to new API. Various bug fixes and additional tests. Coverage at 81%

Conflicts:
	ramp/metrics.py
	ramp/reporters.py
	ramp/tests/test_shorcuts.py