* Removed -HUP so the default -TERM signal is sent instead.
- hyperiond only listens for TERM and INT. HUP is often used to get an exe to reread its config
Changed pgrep to add '-x' so it wont partial match on the exe name.
- I have multiple instances with multiple hyperiond-instance1 names
- this ensures the service script only kills the right process
* reversing errant change to hyperion.systemd.sh
* adding support for SK6812 - not working yet
* Changed rpi_ws281x submodule to be penfold42's fork
* Set White to zero for now
* starting on the code to make the White led do stuff
* Added some basic whie led calculation
white = min(r,g,b)
r-=w, g-=w, b-=w
* cleaned up a couple of compiler warnings
* updated strip type to use corrected RGBW strip type
(the SK6812RGBW datasheet is wrong)
* moved bitpair_to_byte initialiser to (hopefully) work with older GCC
* compiler warning in udp driver
removed some tabs in ws2812b.cpp
* formatting - spaces to tabs
* moved rpi_281x to tag sk6812-v1.0
* attempt #3 at migrating the rpi_281x submodule to my fork/branch
* moving to my fork of rpi_281x
* Started implementing multiple RGB to RGBW conversion options
a quick hack has been implemented inside WS281x.cpp but ive started
moving this to RgbToRgbw.cpp for reuse by other led device types
* migrated RGB to RGBW conversion to RgbToRgbw.cpp
Former-commit-id: ff8e9038c4bb8203b71b42d12bf23be4abcc0b3b
