struct: create develop branch

This dummy commit only serves to establish the new 'develop' branch
struct: Add README-branching

Add a document to describe the desired branching work-flow - after the initial mess has been cleaned up the brute-force way.

This commit also serves for establishing the 'master' branch as separate from 'develop'.
OLLlatex: require mdwlist, paralist

Add support for enhanced list environments to OLLbase.sty
tut: Set up ulPlainTextWorkflows.tex
tut: ulPlainText WIP

Start work on 'plain text' tutorial.
This commit only introduces a few lines, but I have to change computer ...
OLLbase: Fix tex-text mapping issue

-- wasn't resolved to a dash etc.
Fix is to use \defaultfontfeatures before selecting fonts
doc: Update \doctitleifsub

The message that is printed in each sub-document (when it's compiled standalone)
is updated to the current addresses
copyright-notice: change FDL to CC

The copyright notice that is included in all LaTeX documents is changed from
a FDL to a CC license.
This will automatically be propagated to the next compilations,
but the musicexamples-0.2 manual has to be deal with manually
tut: Fix \setbookmaintitle

The main title of the Tutorials book wasn't updated to the new bookpart syntax
ulPlaintext: WIP

sketch document outline
OLLlatex: Add \lilypond command
tut: createSongbooks initial version
Web: Update Tutorials page

Incorporate a suggestion by Ian Hulin
ulPlaintext: WIP

Continue sketch until and including LilyPond/LaTeX integration
ulPlainText: WIP (formulate sketch)

Start writing complete text from outline (-- introduction)
tut: ulPlaintex: Add CHANGES.md example

Example file for Markdown
tut: Add ulStyles.sty

Style file to temporarily store commands defined while writing ul tutorials
tut: ulPlaintext: update CHANGES.md example file

Update used to describe a Git diff
tut: ulPlaintext: WIP

Description of Markdown and Git introduction
tut: ulStyles: Add (diff) listings

add listings language=diff