List packages Status column terminology

[Sivaram Neelakantan]

When you do M-x list-packages, you get the package listings like

--8<---------------cut here---------------start------------->8---
zone-matrix        0.0.1        available  Matrix themed Zone mode
zoom-frm           20140101.56  available  Commands to zoom frame 
zossima            20121123.... available  Ruby from Emacs
zotelo             20130428.604 available  Manage Zotero collections 
all                1.0          installed  Edit all lines matching a 
git-commit-mode    20140110.833 installed  Major mode for editing git commit
--8<---------------cut here---------------end--------------->8---


Why use the word 'available' instead of 'install'?  The fact that I
invoked list-packages itself means that the package is available on
elpa and the only logical statuses are 'install/installed' for
any particular row. i.e as below, preferably in a different face
colour? 

--8<---------------cut here---------------start------------->8---
zone-matrix        0.0.1        install  Matrix themed Zone mode
zoom-frm           20140101.56  install  Commands to zoom frame 
zossima            20121123.... install  Ruby from Emacs
zotelo             20130428.604 install  Manage Zotero collections 
all                1.0          installed  Edit all lines matching a 
git-commit-mode    20140110.833 installed  Major mode for editing git commit
--8<---------------cut here---------------end--------------->8---

 sivaram
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