Added playlist feature for the itunes command: 
if a variable is passed and is valid - will play the playlist
if a variable is passed and is invalid(no such playlist) - will stop all playing
if no variable is passed will print all playlists available on the host

Add the proper config bin directory to `PATH` instead of the previously (incorrect) fixed `~/.composer/vendor/bin`. Nowadays the right config dir is `~/.config/composer/vendor/bin`.

Signed-off-by: Guyzmo <guyzmo+github+pub@m0g.net>

Adds remove/global remove and optimize-autoloader commands.

missing \ was causing command not found errors when tab completing docker build -t <tab>

If autoenv was installed with pip and modifier --user, activate.sh will be at .local/bin

* Sort gradle options for autocompletion

This will allow us to more easily keep the options list up-to-date

* Add missing gradle options to gradle plugin

Reflect documentation at
https://docs.gradle.org/3.2.1/userguide/gradle_command_line.html

* Improve UX for Spotify commands in osx plugin

Spotify command UX is a bit weak for people who live and work almost entirely in shells.
- `spotify quit` should not open Spotify if it is not already running. Should confirm that Spotify is indeed not running.
- `spotify quit` should not blow away the user's shell once Spotify is quit. This can be a disruption to work flow.

This PR looks to add a few little checks which will help improve this experience.
This PR also adds a space to line 477 between `break` and `;;` for consistency. Doesn't seem like a big enough change to put in its own PR.

* Rearranging output as per peer feedback

* osx plugin's spotify: change quitting w/ closing

Closing is more idiomatic English.

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

* Add mvn asciidoctor commands
* Fix formatting in mvn plugin

* Add a React Native alias, and one to start the web server

* Reorganise aliases in react-native plugin

* Update README for react-native plugin:

  Fix format and add a brief description
  Add missing aliases in react-native plugin README