refactoring. add errorformat and commentstring.
add dtplugin
fix errorformat
fix codeformat.
added rbtnn to AUTHORS
update errorformat
fix about notes. (thanks dbarnett, sigmundch)
Merge pull request #7 (refactoring. add errorformat and commentstring.)
disable plugin indentation settings
Use Dart code style when variable g:dart_style_guide is set
Merge branch 'master' of https://github.com/Grelek/dart-vim-plugin

Conflicts:
	ftplugin/dart.vim