Fix #111531 (Create marching ensemble templates)

[duck57]

Added templates for a marching band and two sizes of marching
percussion ensemble.

The marching percussion templates were originally called “WGI”, but
they also work nicely for marching bands that follow the workflow of
having their fully-realised percussion parts written separately.

NOTE: divisional linked parts are not part of these templates,
as they may slow things down too much. If you want these templates
with the divisional parts, e-mail chris@euchre.us

[Jojo-Schmitz]

You need to add the new files and update the changed file's name in .../share/templates/CMakeLists.txt

[IsaacWeiss]

While at it, if you edit the commit message to include "Fix #111531", then the issue in the tracker will automatically be marked as fixed when this PR is merged.

[Jojo-Schmitz]

You still need to add the new files and update the changed file's name in .../share/templates/CMakeLists.txt, to get the 'make install' step working.

[duck57]

I thought that making CMakeLists.txt was precisely what commit 9df7b91 was for. Did my changes not actually go through, or did I make a mistake in adding the new files?

[Jojo-Schmitz]

Oops, sorry, didn't notice that. However, Travis still fails:
file INSTALL cannot find
"/home/travis/build/musescore/MuseScore/share/templates/07-Band_and_Percussion/03-Marching_Percussion_".
Seem CMake doesn't like the (...) stuff. You'd need (...)

[Jojo-Schmitz]

Make it 07-Band_and_Percussion/03-Marching_Percussion_\(battery\).mscz, i.e. 'escape' the parens with a backslash

[duck57]

Travis seems to be failing something about breath-add.mscz. No idea if this is something I broke with new templates or if it's from an unrelated change. It seems to have a much, much longer log file, so I assume it built properly and it's just a unit test that failed.

[lasconic]

The breath add is my fault. I'm fixing it.

[lasconic]

Can you squash your 3 commits together? See http://gitready.com/advanced/2009/02/10/squashing-commits-with-rebase.html

[duck57]

I've squashed the commits.

Note for any future readers (mostly myself): the GitHub desktop application doesn't push squashed commits (it instead separates them back out and restores the ones that it has on its servers). Instead, use git push origin -f from your terminal to get things working smoothly.

[lasconic]

@duck57 I just merged it in master but forgot to make you sign the MuseScore CLA. Could you take a look to https://musescore.org/en/cla and sign it? Thanks!

[duck57]

I've sent in the CLA.

[lasconic]

Thank you !