Celtic: outstanding data tasks

[cormacanderson]

• Add phonetic transcriptions for 1 to 5 in all varieties.
• Add standard spellings for the mutation phrases in all standard languages.
• Add remaining standard spellings: Breton, Cornish, Manx.
• The Vannetais Carnac recording for 'two' seems to be present, but doesn't play. A blank sound file?
• The word names don't appear with the correct short form vs. long form (by hover tip) in some cases, probably because they're in the database wrongly, and need correcting using the 'translation' system.
• 'Cornwall', 'Isle of Man' and 'Historical' appear in the 1-Word table view, but shouldn't because we have no such languages yet.