* 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
* cleaned up a couple of compiler warnings
* 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
* moving to my fork of rpi_281x
* removed dos line endings
* Found some more "dos" line ending files
* Added multicast support to the udp listener "effect"
* the default udp.json will listen to unicast on port 2391 (as it used to)
the new udp-mcast.json will listen on multicast 239.255.28.01:2801
Former-commit-id: 5c76fabd3da141094f5434ed869420ad6e581fd8
