[Emacs] Install restclient

restclient.el provides a major mode for interacting with RESTful APIs.
[Emacs] Increase width of line number column
[Emacs] Improve Org agenda and capture maps

- Provide shortcuts to agenda and capture menus outside of the "r" namespace
- Allow access to default agenda view with "a"
- Allow specification of date for journal capture
[Vim] Spelling additions
[Vim] Remove Jekyll script

Superseded by noahfrederick/vim-jekyll
[Vim] Update CSS snippets

Adds a .clearfix definition
[Vim] Open QuickFix list after grep-like commands
[Vim] Add :ShoppingList command
[Emacs] Ignore elpa/ directory
[Vim] Fix Python feature detection in guard