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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

Although `gaa` (git add --all) is cool, it stages every file, tracked or
not, if it is not on .gitignore.

Sometimes we want to just stage everything we are working on, that is
already tracked. For that reason, 'gau' can save us some time.

Closes #5683