Fix relative VST paths on Windows
Merge pull request #964 from diizy/stable-1.1

Effect plugins: don't set modified flag on control changes
Merge pull request #966 from diizy/stable-1.1

ProjectJournal: cap the number of undo states to prevent infinite memory...
Merge pull request #969 from tresf/patch-1

Fix relative VST paths on Windows
Sanitize master output
Replace any inf/nan in master output with zero, to prevent corrupted files/audio.