feat(tagbar): formatting for use with vim tagbar.
feat(tagbar): formatting for use with vim tagbar.

features:
parsing variable types and function/method signatures.
identifying getters, setters, operators, and abstract methods.
tagging public/private fields and methods.
better line number matching.

fixes:
tab deliminated at the end of the string, which would make tagbar crash
without enabling line numbers.
various dart lint suggestions.

nerdrew/dart-ctags