set piano directory as default for doing file opens in the piano effect
Merge branch 'master' of https://github.com/smeighan/xLights

Conflicts:
	xLights/xLightsMain.cpp
3.2.11 release. increase pixels per string from 1000 to 65536
Merge branch 'master' of https://github.com/smeighan/xLights

Conflicts:
	README.txt