Merge pull request #493 from chrisbra/master

Enable :AirlineToggleWhitespace,
append to the existing value in case the user defined it.
new NrrwRgn integration
doesn't assume user has 'set autochdir' set
Merge pull request #496 from chrisbra/new_feature_nrrwrgn

new NrrwRgn integration
Merge pull request #497 from johnathanz/master

doesn't assume user has 'set autochdir' set
fix minor typo in help text
Merge pull request #498 from lumbric/master

fix minor typo in help text
Update README.md vundle installation instructions

[vundle is undergoing interface changes](https://github.com/gmarik/Vundle.vim/blob/master/doc/vundle.txt#L372-L396)
Merge pull request #499 from steve0hh/patch-1

Update README.md vundle installation instructions
updated nrrwrgn integration
Merge pull request #500 from chrisbra/updated_nrrwrgn

updated nrrwrgn integration
Fix #456

Fix for #456 Status line text color too dim for inactive windows.
Merge pull request #503 from saamalik/patch-1

Fix #456 Status line text color too dim for inactive windows
add readonly mode so it can be themed independently. resolves #510
Fix #462 - Configurable head limit.
Merge pull request #526 from bennidhamma/master

Fix #462 - Configurable head limit.
Merge remote-tracking branch 'upstream/master'