Merge pull request #3 from ihincks/master

Made DirectViewParallelizedModel compatible with remote ipython engines.
Acknowledged IH for recent pull request #3.
Started WIP on refactoring of BCRB support.
Added constant outcomes Fisher info calc. Seems to work?
Continued work, skeleton of DifferentiableBinomialModel.
Added fisher_information impl for DifferentiableBinomialModel.
Started refactoring SMCUpdaterBCRB to use fisher_information.
Fixed definition of initial prior BCRB.
Added initial_bim as kwarg.
Very minor bugfixes.
Added multivariate normal distribution
Merge remote-tracking branch 'origin/master' into feature-fisher
Bug fixes in distributions
Fixed silly problem with PostselectedModel.
Merge branch 'master' of github.com:csferrie/python-qinfer
Fixed PGH to avoid NaN.
Merge branch 'master' into feature-fisher
Fixed very, very rare bug in SMCUpdater.sample.
Added link to RTD builds.
Small bug fix in MV normal dist.