Add details of how to check whether `+python` is built
Add details of how to check whether `+python` is built

Squashed commit of the following:

commit 637cd2d7be8661ea74cdd35042e97242443d1247
Author: Xavier Vergés <xverges@gmail.com>
Date:   Thu Feb 26 21:41:09 2015 +0100

    Update README.md

commit f9c3b2c629f7a66a2944446b557bfe01fa8a52c5
Author: Xavier Vergés <xverges@gmail.com>
Date:   Thu Feb 26 21:39:45 2015 +0100

    Chewck if python is there by typing `: ver`

commit eaf874cede0d4beb14acceb46fca46da304aeb44
Author: Xavier Vergés <xverges@gmail.com>
Date:   Thu Feb 26 20:53:05 2015 +0100

    Described how to verify if python is enabled

johnfraney/editorconfig-vim,pocke/editorconfig-vim,VictorBjelkholm/editorconfig-vim,johnfraney/editorconfig-vim,benjifisher/editorconfig-vim,pocke/editorconfig-vim,pocke/editorconfig-vim,VictorBjelkholm/editorconfig-vim,benjifisher/editorconfig-vim,VictorBjelkholm/editorconfig-vim,johnfraney/editorconfig-vim,benjifisher/editorconfig-vim