Added mdtool build fallbacks
Revert "Added mdtool build fallbacks"

This reverts commit 0092c5abb74454df1e72e5eda0ace13bb93d20d5.
Added mdtool build fallbacks
Merge pull request #510 from foerdi/master

[Building] Made project builder be able to build projects with mdtool / no IdeApp.Workbench open