made RecursiveLexicon; changed SimpleLexicon.propose to not copy values
for speed
merge
Merge branch 'master' of https://github.com/piantado/LOTlib
Merge branch 'master' of https://github.com/piantado/LOTlib
see commit messages!
Updating NumberGame/GrammarDemo -- error: h.compute_prior does not change when grammar value updates!
_
Merge branch 'master' of https://github.com/piantado/LOTlib

Conflicts:
	LOTlib/Examples/__init__.pyc
GrammarDemo tweaks
Working on GrammarDemo; GrammarHypotheses do not converge with MH.