Generate a symbol2verbalization mapping for SMGloM

[kohlhase]

We currently have a way to generate mathematical translation pairs from the SMGloM modules. But for the lmh pre-translator we really need the symbol-to-verbalization mapping (see MathHubInfo/Legacy-localmh#218). We should generate that as well. I am aware of the fact that this is an ambiguous mapping, so we want to generate a ternary relation with triples <t,l,v>, where t is a mathematical term, l is a language, and v is a verbalization of t in languge l.
Assigning to Mihnea, who may decide to dump in on Enxhell

[kohlhase]

this is related to the terminological relations issues #36 assigning to Akbar.