Remove obsolete DI in fakeMorphRetriever
Add ngResource to arethusa.morph
Don't fall when morph encounters no initial form
Bring back old tokenRetriever

Use it additionally to the treebankRetriever.
We don't want to spam DoS attacks on the bsp server during development
of this service...
Add toAry fn to arethusaUtil
Show lemma information for morphology
Add arethusaUtil.inject