Test trivial chorus DSP.
Fix DSP test name.
Style fix.
*
Test synchornisation of device keys.
Fix device implementation interface to properly support different types of state changes, fix chorus updating.
Automatically find tracker modules to be installed.
Fix style.
Test paused playback of empty composition.
Initialise audio buffers with zeros when playing a composition without connections.
Merge pull request #80 from kagu/fix_silent_chorus

Fix silent chorus
Merge pull request #81 from kagu/fix_install

Fix install
Merge pull request #82 from kagu/fix_uninit_audio

Fix uninitialised audio buffers