Saphon dialects

This branch edits the same script as #37, and is based off its branch, so PR #37 should be merged before this one.

This PR implements the stripping of dialect information from the SAPHON ISO codes column, parses out the parenthetical dialect names from the `LanguageName` column and adds them to the `SpecificDialect` column, and then reduces the `LanguageName` to just the main name without the parenthetical dialect text. It also fixes some bugs with the SAPHON phoneme processing that I discovered along the way.

Closes #34