Fixes issue #44 with likelihoods figure: cuts axis at -750, 0, equalized bins into units of 10, and reorders order in which models are graphed for better visibility.
Merge remote-tracking branch 'upstream/master'
Adds relative likelihood calculation and output, skips AICc weight calculations if likelihood is greater than zero for Poisson lognormal.
Adds database import for relative likelihoods.
Adds relative likelihood graphs, fixes a binning problem with one of the likelikelihood graphs (forgot to set the bins).
Switches from testing extension to analysis extension, ready for full run.
Removes piece to skip calculating AICc values if Poisson lognormal log-likelihood is negative, it seems this is in fact possible in some cases, but means that the fit is really, really not good.
Adds relative likelihood information to methods.
Merge pull request #46 from embaldridge/master

Addresses issues #44, #45.