Merge pull request #4 from jpmckinney/ca

Add identifiers and mappings for New Brunswick provincial electoral districts
Clarify tilde rule to not convert underscores.
Simple state 'All invalid characters', as punctuation varies according to locale
Make two ID creation steps explicit
Use correct word, pluralization
Merge pull request #6 from jpmckinney/ca

All Canadian provinces
Merge pull request #5 from jpmckinney/patch-1

Clarify type ID creation rules
Use "ed" instead of creating multiple types like "fed", "ped", etc.