Add spec for configurator.shallowMerge()
Split configurator.shallowMerge() spec in three
Implement configurator.shallowMerge()
Make configurator.shallowMerge() more flexible
Refactor configurator.shallowMerge()
Comment configurator.shallowMerge()
Store format info in treebankRetriever
Patch configurator.loadAdditionConf()

Apart from link tags the special conf property "fullFile" is used to do
a shallowMerge with an additional configuration file which can either
be a string (which is then looked up at
`services.perseids.org/arethusa-configs`) or a fully qualified http url
Update the perseids base conf file
More updates to perseids base conf
Add sg conf to perseids base conf
Make staging2 more robust
Read conf in MainCtrl more dynamically
Even more stuff for staging2
Fix lousy default in perseids base
Don't fire events prematurely

Navigator could trigger stateLoaded when a chunk param is present. We
don't want to do this before we are ready to launch.
Minor fix in base perseids conf
Map old aldt format to new standards
Add perseids_review configuration
Read plugin from child scope in pluginContextMenu