TICCL-anahash: Add the wordforms to the foci file

[kosloot]

@martinreynaert suggested:
It would be handier, too, if the focus file would also list the actual word forms included, for easy reference.

This can easily be implemented. But will of course affect all tools using the foci file. (current only indxer and indexerNT)

[kosloot]

@martinreynaert
as more wordforms could lead to the same anagram/foci value, this would mean that we get some kind of mapping:
foci-value#word1,word2,word3...
This makes loading a bit slower: splitting and such, but alas.

You write:
This last would also enable TICCL-LDcalc to focus only on this (probably) single version of
the possible anagrams associated with a particular anagram value, rather than processing
them all.

At the moment, LDcalc doesn't use the foci ( but indexer and indexer NT can)
I see the advantage of only handling angrams that are 'real' but don't know how you want to use in in LDcalc