0.1.0-beta1

• Change the features extracted from an ingredient sentence
  • Replace the word with the stem of the word
  • Add feature for follows "plus"
  • Change features combining current and next/previous part of speech to just use the next/previous part of speech
• Improve handling of plural units
  • Units are made singular before passing to CRF model. The repluralisation of units is based on whether they were made singular in the first place or not.
• Add test cases for the parser_ingredient function
  • Not all test cases pass yet - failures will be future improvements (hopefully)
• Better align behaviour of regex parser with CRF-based parser.