getTextAvailablePrograms: for nicer user feedback

similar to:  getTextInstalledPrograms: for nicer user feedback #96 

```
===== SAVE COMPRESSED DOCKER IMAGES =====

    elm-get-git-dev elm-git-dev emacs firefox firefox-flash firefox-java git irssi libelm-platform-git-dev libhaskell-platform libreoffice libx11 skype vim xterm
workerm@notebook:~$ subuser save-compressed-images vimd

===== SAVE COMPRESSED DOCKER IMAGES =====

    elm-get-git-dev
    elm-git-dev
    emacs
    firefox
    firefox-flash
    firefox-java
    git
    irssi
    libelm-platform-git-dev
    libhaskell-platform
    libreoffice
    libx11
    skype
    vim
    xterm

workerm@notebook:~$ 
```
fixup! getTextAvailablePrograms: for nicer user feedback