Release 2017.15 released. 5x speedup 64bit vamp plugins, support 6804 uploads

[smeighan]

Release 2017.15
New support for uploading to 6804 controller, 64bit vamp plugin now 5x faster, bug fixes

Latest releases are found at www.xlights.org
Videos tutorials are found at videos.xlights.org
Forums are located at nutcracker123.com/forum
Issue Tracker is found here: www.github.com/smeighan/xLights/issues

XLIGHTS/NUTCRACKER RELEASE NOTES:
---------------------------------
2017.15 May 31, 2017
-- bug (dkulp) Fix crash if submodel is part of a preview
-- enh (keith) Add E6804 controller configuration support
-- bug (keith) Fix errors with FPP config
-- bug (keith) Fix xyzzy on matrixs on start channels other than 1
-- bug (keith) Fix triangle wave effect crash
-- enh (keith) Enhance wiring view and add light background option
-- bug (keith) Fix hang in blend transition
-- enh (keith) Add documentation of xSchedule variables into the UI
-- bug (keith) Fix some issues with layer counts in preset window
-- bug (keith) Fix end channel display if multiple universes are grouped under one output
-- bug (keith) Fix 64 bit vamp performance on windows