Remove 'musicexamples'

the 'musicexamples' folder is removed because that is now an independent repo
Move OLLib toolboxes in tb subdir

Part of redesign: OLLib will be common parent dir for several libraries
(partly conceptually separated, partly just 'historically' (i.e. from whom they stem))
Therefore the current subdirectories with 'toolboxes' (from 'ulLibrary') get another directory level 'tb'.
This move hasn't been tested, so maybe there will be some fixing to do later
Move latex folder to documentation subdir

The latex folder contains stuff that latex authors need, not stuff that a user of openLilyLib needs, so this commit shoves it out of the way

This affects existing 'installations' - one has to either update the symlink or change latex's search path accordingly
Move OLLtutorials to documentation/tutorials
Merge remote-tracking branch 'upstream/master'

Conflicts:
	musicexamples/documentation/musicexamples.tex