Show track on HSI.
Use refs to reduce copying.
Cache property paths in the PropertyStorage object for quicker access.
Optimize PropertyNode::write() et al.
Make PropertyNode::locate(...) inline.
Fix last commit.
Don't bother deep searching if node was not found in Storage by the absolute-path.
Use QEvents to signal that data has been updated instead of polling.
Call data_updated() when invalidating input data.
Fix Makefile symlinks.
Cleanup Makefile.