generator: create INCLUDE directive to include constants, methods and properties from other xml files. checked on printing_zebra,
also update error coloring
generator: fix including files during non rhogen api calls
generator: set correct items ordering
generator: minor cleanup
generator: check for duplicate descriptions
generator: do not handle duplicate check cases with empty descriptions
generator: check for constants with same values
generator: check for empty element names when including templates
generator: generate property name constants
Merge pull request #224 from rhomobile/rhogen-include-xml

generator: create INCLUDE directive to include constants, methods and pr...