sublime text: default `cmd+v` to paste and indent.

Swap keybindings for paste & paste and indent.
sublime text: add GhostText package.

Note: requires the Chrome extension (https://chrome.google.com/webstore/detail/ghosttext-for-chrome/godiecgffnchndlihlpaajjcplehddca)
to work.
sublime text: specify highlight style in ColorHighlighter.
sublime text: add expand-selection-to-quotes package.
sublime text: improve CSS & JS syntax highlighting.

Add JavaScriptNext - ES6 Syntax & Sublime CSS3 packages.
Open all `.css` files with CSS3 syntax.
sublime text: improve code presentation.

changes include:
- bigger caret
- highlight whole line
- better visibility on indent guides
- force matching all types of brackets
- better visual spacing on code through line padding options
zsh: force EDITOR to open in new window.