GDP: LM 3-4

[Graham Percival]

I'd like to draw attention to the Learning Manual, chapters 3
Fundamental concepts and 4 Tweaks.

- if you're a new user, PLEASE read these in detail.  There's a lot of
very helpful information in there.  In addition, it should all be
understandable -- if you start at LM 2 Tutorial and read to the end of
LM 4, you should be able to understand everything.  If you can't, we
consider it a bug in the documentation.  :)

- if you're an advanced user and haven't done so already, please skim
through this material.  The lilypond docs are famously written by
people who don't know what they're talking about[1], so we really need
knowledgeable users to verify what we write.

[1]  No insult to Trevor Daniels; he's done an amazing job of the LM.
But he had to learn each subject from scratch in order to write the
docs, so there's no guarantee that he covered everything.


Latest GDP docs
http://web.uvic.ca/~gperciva/

(although these are almost identical to the 2.11.39 docs at the
moment)

Cheers,
- Graham