Fix: Correctly clear state of MimeTypeBuilder after getting built type.
Fix: Default quality factor to 1 in TypeBuilder.
Fix: Extract refactor token definitions into own class.
Add: Static utility method to Token, checks to see if string is a token.
Add: FieldParser, accepts token array & returns array of hydrated types.
Fix: Ensure tokenizer strips any whitespace padding around tokens.
Fix: Switch out regex method of negotiation with tokenizer.
Fix: Remove RegexProviders and Factories, update tests.
Fix: Typo & code style.
Fix: Rename variables for clarity.