ch1: Add "Mozart" stub directory
ch1: Add "MuseScore 2.0" stub directory
ch1: Add "Sibelius 7" stub directory
ch1: Add "LilyPond" (stable/dev) stub directories
ch1: Add "Finale 2014" stub directory
ch1: Add "Lilypond-custom" stub directory

A directory of an attempt with latest builds
ch01: Initial README
ch01: Add README.md and score example
ch01: Add preview image for README
ch01-Readme: Link to general rules
Main README: Add info on communication channels
Merge pull request #1 from openlilylib/prepare-challenge-1

Prepare challenge 1