This fixes Gentoo bug #507712 (https://bugs.gentoo.org/507712)

Signed-off-by: Lars Wendler <polynomial-c@gentoo.org>
fix #24951: grace notes after enabled
add variable MSCORE_OUTPUT_NAME, to be used like cmake .. -DMSCORE_OUTPUT_NAME=mscore-nightly
commented :)
Added tempo marking import for GP3 files
Fix #21732- Support for changing tempo in GP4 and GP5 files
commenting out omr shortcut

to prevent an "Internal error: shortcut <omr> not found" message
don't load shortcuts without GUI

i.e. in converter- or plugin mode, as it doesn't make any sense then.
Merge pull request #878 from Jojo-Schmitz/omr

commenting out omr shortcut
Merge pull request #879 from Jojo-Schmitz/shortcuts

don't load shortcuts without GUI
Merge pull request #874 from akdor1154/mscore_output_name

add MSCORE_OUTPUT_NAME, to be used like cmake .. -DMSCORE_OUTPUT_NAME=mscore-nightly
Merge pull request #877 from jpirie/21732-tempo-changes

Importing tempo changes in Guitar Pro files
update README
remove stafftype subclasses
refactoring StaffType
update mtest
update mtest
fix warnings reg. unused parameters
removing 2 qDebug() calls

followng some discussion on IRC
Make zoom() code a little nicer