* Remove the unused getJsonForPrefixes() method
* Merge initializeNewPrefixes and initializeRestartPrefixes which only
  differed in if they accepted too many/too few prefixes and clearing
  the _prefixVec
* Also remove TODOs that were cleared up

The MetaDataConverter seems to break on trying to convert (i.e. detect
as fine) a current index. I don't think that has anything todo with the
new changes but these are untested until I figure that out.