Add URL to description
Version to 0.3-1 to distinguish from release
Refactor column handling

 - allow arm-based data to be either [mean, std.dev, sampleSize] or
   [mean, std.err] for consistency with relative-effect data.
 - let mtc.model add an std.err column to the data before calling any
   of the code/data generating methods.
 - have each likelihood/link require its own set of columns, in
   preparation of likelihoods that require additional information
 - no longer test presence of columns on reading mtc.network, since only
   the likelihood/link know which columns are required
Test likelihood/links are fully implemented
Implement poisson/log inference
Add poisson/log integration test
Remove redundant fields from model data
Validate data.ab in mtc.model.data
Fix error in pseudo-inverse / trial decomposition
Use dev.hold/dev.flush for faster blobbogram
Refactor required columns for data.re

 - no longer specify per likelihood/link since the code assumes the same
   format for all likelihood/links anyway
Refactor: rename network$data to network$data.ab
Add to NEWS
Add unit tests for model$data

This was broken at some previous stage.
Implement fixed effect models
Integration test for fixed effect model
relative.effect bugfix with test
Update NEWS
Be explicit about drop=TRUE/FALSE when indexing

Prevent bugs when generated index has just one element.
Expose ll.call for web service (among others)