auto restore cursor to last edit position when open file
Update airline documentation

+ Update README and linked image
Merge pull request #454 from jacobwalker0814/airline_doc

Update airline documentation
Merge pull request #446 from perfectworks/saveLastJump

auto restore cursor to last edit position when open file
Added <C-Enter> key mapping for <Esc>
Merge branch '3.0' of https://github.com/spf13/spf13-vim into 3.0