0.1.0-alpha2

Incremental changes:

• Improved documentation
  • Automatically extract code and version from source files.
• Added regular expression based parser
  • This provides an alternative to the CRF-based parser, but is more limited
• Improvements to labelling of New York Times dataset
  • Label size modifiers for unit as part of the unit e.g. large clove, small bunch
  • Consistent labelling of "juice of..." variants
  • Consistent labelling of "chopped"
  • Consistent labelling of "package"
  • Reduce number of token labelled as OTHER because they were missing from the label
• Fixes and improvements to pre-processing input sentences
  • Expand list of units to be singularised
  • Fix the preprocessing incorrectly handling words with different cases
  • Improve matching and replacement of string numbers e.g. one -> 1
  • Fix unicode fraction replacement not replacing
• Improvements to post-processing the model output
  • Pluralise units if the quantity is not singular
• Start adding tests to PreProcessor class methods