- ag shortcuts support directories, and paths with spaces when opening.
- find shortcuts support directories, paths with spaces when opening, and coloured output.
- "~/" => $HOME throughout.
- `isdown` has fancier output - formatted, no longer raw HTML.
- Removal of un-necessary arguments in ls shortcuts.
- IP aliases converted to functions, cleaner, error checking, and copies to clipboard.
- `chromekill` moved to functions.
- Double quotes => single where suitable.
- Various best practice tweaks.
- New `d` function, lists directories sorted by file size.
- zshrc cleanup, formatting tweaks, more options.