0.2.13

• Update methods' color to match functions. Fixes groovy functions, since
  they're all methods on the global Script object.
• Color Groovy's modules the same as other languages.
• Add support for variable.other.constant. Fixes stuff in Ruby.
• Color method and method-call the same as definition.method
• Color all *.readonly semantic tokens as constant.
• Color YAML keys the same as JSON properties.