preparatory xsl for checking controlevents

first version of stylesheet, needs further improvement for different
meters and for dealing with tuplets
Revert "preparatory xsl for checking controlevents"

This reverts commit 1ad76c884be6e966c9350ff2778995bcde48c63c.
Merge branch 'release-0.2.0'
remove whitespaces from @abbrev and description
bump version number
Merge branch 'hotfix-existInstall' into develop