new version stuff
get rid of the compatibility layer of jedi
Add example installation command

It's easier if an example installation command is there for you.
Update README.rst
Merge pull request #256 from justincheevers/patch-1

Add example installation command
Update jedi.vim
Merge pull request #260 from haconeco/master

modified mapping to :call goto_window_on_enter()
Merge remote-tracking branch 'origin/master' into dev