Closes #4988

`gls` seems to be installed by default or on most macOS systems, but its
default color scheme sucks. This fix will make sure to only use it if it
has been customised prior to running OMZ.

Related: #5516, #5520.

Closes #5594

PHP can be executed as CLI script but due to the automated attempt
to add browser support to that extension such ability is prevented
in certain circumstances.

Closes #5558

* add docker-compose down alias

* rename `docker-compose down` alias to `dcdn`

* Add a tip to ease agnoster first setup

* Change link to agnoster wiki + format changes

https://github.com/robbyrussell/oh-my-zsh/wiki/Themes#agnoster

https://github.com/robbyrussell/oh-my-zsh/wiki/Themes#agnoster

Closes #5568

Source:
https://github.com/docker/docker/commit/c9fdf9abf8d6443598808809b900d96e04adfcb1

* Add '#' instead of '$' when in root
* Make return code bold

Display suvash prompt w/o Ruby; refactor code

Change OS X to macOS in the README file in line with apples rebranding
of the operating system.

Change OS X to macOS in the read me file in line with apples rebranding
of the operating system.

Fixes #5520.

Removing one "apt-get autoremove" alias because it is duplicated.

The m4a file format can be opened in the command line with mplayer

This allows for the user to combine the jump command with something else. In my example cd and jump are now combined like this:

```bash
jumpcd() {
        jump $1 > /dev/null || cd $1
}
alias cd="jumpcd"
```

The command `compdef command=git` returns an error in some cases, the
appropriate command is `compdef _git command`.

Fixes #5442

Fixes #4834

Latest version: February 17, 2016 - dd81201

Also:

- Changes `globes` (which doesn't exist) to `glob expressions`.

- Delete the `trigger autocompletion to your current aliases` use case, since that's not
  really implemented.