inflection types for UniMorph

[chiarcos]

UniMorph does not properly distinguish paradigms. This information can be added in a subsequent (language-specific) step. However, this only makes a practical difference if a inflection types represents one form for a particular function.

A quick fix is to change the inflection URI pattern to include the morph, a deep fix is to link paradigms and forms with rules rather than inflection types and to model inflection types as aggregates [or types]. I prefer the latter, but it requires a model revision. Until this has been discussed, we don't touch this issue.