Add info to KDE Fundamentals

[Ivan Stanton]

I think that the KDE Fundamentals documentation is great. It offers users
with a starting place in using KDE. However, it is missing information on:
-the Plasma panel
-KDE neon
and does not list KDE apps, what they do, and where their documentation is.
-- 
~~~~~~~~~~~~~~~~~~~~
neon GNU/Linux Developer Git-Unstable
Making Plasma appealing, one document at a time.