this affects all languages using the elision filter
languages fr and it are updated now
languages ca and ga are still missing other components and
do not yet have an analyzer, but they should follow this lead
once they are ready
fixes#218
ultimately this is make it more convenient for us to wire up
different elements of the analysis pipeline, without having to
preload everything into memory before we need it
separately the index layer now has a mechanism for storing
internal key/value pairs. this is expected to be used to
store the mapping, and possibly other pieces of data by the
top layer, but not exposed to the user at the top.
