Exclude metalanguage in AECD definitions from search-definitions

[aarppe]

In addition, there's some AECD-specific encoding, such as Alt. or Var. for alternative or variant Cree word forms, (Plains) and (Northern) indicating dialect, that we wouldn't want to include in the search. For the 731 Alt. cases and 180 Var. cases, we'd probably want to encode the Cree word-forms appropriately (something for Daniel), perhaps marking them with <crk>...</crk>.

Originally posted by @aarppe in #101 (comment)

[aarppe]

When processing the AECD definitions, exclude metalanguage such as Alt, Var, (Plains) and (Northern) from the search-definitions (i.e. what words are included in indexing and searching the dictionary entries).

[fbanados]

I will check that this is happening.

[fbanados]

(Plains) and (Northern) are subsumed by the removing of parentheticals. Some changes in code are required to deal with Var. and Alt.