add feature regression stuff
fix typo
tweak demo
tweak regression demo
tweak feature setup
low-level code for feature regression models
tweak demo
add separate trans model
change demo to weak limit sticky w/ conc resampling
Removing resample_init_emission_distn until it works with nans
add correctness check on fast resample_obs_distns
remove states from __init__.py, tweaks
Merge remote-tracking branch 'origin/feature-regression' into delayed-geo

Conflicts:
	models.py
	states.py
fix old class name
add duration delay sampling mixin
fix inconsistent MRO problems
tweak FastHMM obs resampling for easier initialization
Merge branch 'delayed-geo' into low-level-lti

Conflicts:
	messages.h
	messages.pyx
	models.py