node-split: data rewriting functions
node-split: WIP model generation
Working node-split model
Node-split: run, summarize, plot many models

 - mtc.nodesplit() runs an ensemble of models
 - summary.mtc.nodesplit() generates useful summaries
 - S3 plot & print methods on the summary

 - Add mtc.model.run() helper that automatically proxies arguments to
   mtc.run or mtc.model as appropriate
Enable DIC calculation for JAGS
Somewhat less awkward handling of DIC
Bugfix mtc.nodesplit
Mention scale in summary.mtc.result
Fix
Fix tests
Update NEWS, DESCRIPTION
Simple test for multi-arm decomposition
Add preferredDirection & default plot to rank.probability
Sanity check nodesplit parameters
mtc.nodesplit documentation
Document model types in mtc.model
ANOHE fix & documentation updates
Update news
Backwards compatibility fixes for validation tests
Remove debug prints