Open files with .cl extension in lisp-mode

I'm surprised that this isn't already the case.

Although most people use the .lisp extension, some do use .cl
Correct terminator for .sbclrc
Open .podspec files in Ruby mode

.podspec files use a Ruby DSL for the CocoaPod dependency management
system, common in iOS development.

Although the Podspec file correctly opens in Ruby mode, the .podspec
file does not. This corrects that.
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->`
Improve version check
Always load newest byte code
Add a basic shell module with some pretzo-related config
Correct conflicting keybinding
Add basic company config
Add ruby-mode to Puppetfiles

Puppetfiles are similar to Gemfiles, but for librarian-puppet, that
manages dependencies on Puppet modules.