GoLang support
Better highlighting of tabs and trailing spaces

Now using unobtrusive characters and ones you are not likely to type.
Document better solarized vim for solarized terminals.
Merge pull request #321 from barraponto/solarized_docs

Document better solarized vim for solarized terminals.
Merge remote-tracking branch 'upstream/3.0' into 3.0
remove some mapping
config & add/remove some bundles