Fixed preamble.
Merge branch 'master' into exp-resampler
3cos
Added cache dirtying semantics.
n_particles now a dependent property, making it easier to load/restore updaters. (h/t IH)
Added __getstate__ to parallel model to prevent pickling problems.
Added patch from IH.
Minor formatting fix caught by IH.
Caught up to latest changes in master. Still needs testing.

Conflicts:
	src/qinfer/smc.py