Fix apostrophe, dash support in words

This update fixes some cases where inconsiderate terms were
never detected, because they included dashes or apostrophes.
Terms are stripped from these characters before checking if
they’re included in the database, resulting in never matching.

This was fixed by removing these characters (`-`, `'`, and
`’`) in the database, checking if they’re included in the
build-script, and adding several tests for them.

Related: GH-4.