Move openLilyLib files to temp-dir
Move openLilyLib files from tmp to final (root) dir
tut: Fix \setbookmaintitle

The main title of the Tutorials book wasn't updated to the new bookpart syntax
tut: createSongbooks initial version
tut: songbooks: clean up formatting

clean up the formatting of the initial contribution.
Main changes:
- Remove spaces inside \texttt{} commands
- Change \texttt to \cmd or \package
- split lines to one sentence per line