Modified the URL 

Added the correct URL for WikEmacs articles on installing Emacs.
Add ace-jump-buffer to Prelude

Keybindings set to `C-c k` and `S->`
Merge pull request #511 from Abizern/ace-jump-mode

Add ace-jump-buffer to Prelude
Merge pull request #509 from dkr05/master

Modified the URL
Merge remote-tracking branch 'bbatsov/master'