0.12.0

Added

• colors in both themes and patterns can define and reference nested tables, ie
  triad.first = '#ff0000' and triad.second = '{{ colors.triad.first }}
• styles in both themes and patterns can define and reference nested tables, ie
  triad.first = '#ff0000' and triad.second = '{{ colors.triad.first }}
• scope styles can reference nested style tables

Changed

• colors in themes and patterns must be defined as a string (previously you'd
  get wierd errors, now it's formalized and you'll get a proper syntax error).