Feature: Upgrade AmpliPi's directory structure for debian releases

[linknum23]

• Update AmpliPi layout, from /home/pi expectations to more standard linux layouts /etc/amplipi.conf , /var/web/amplipi, /usr/local/lib/amplipi, /usr/local/bin/amplipi,
  • Decouple stream scripts from /home/pi (all other python is relative)
  • Add memory drive for /var/web/amplipi/generated (requires Use a RAM disk for volatile configuration #76)
  • Make amplipi able to be used and developed on using the simpler base directory structure (you should be able to run the debug webserver (with real streams if you want) from a git checkout)
  • Add /etc/amplpi.conf config file that is checked when a local config file is not found

Layout:

config/house.json -> /etc/amplipi.conf # includes hints for this directory layout (stop saving this all the time)
streams -> /usr/loca/bin/amplipi/streams # streaming scripts
amplipi -> /usr/local/lib/amplipi
web -> /var/web/amplipi

We still need to figure out where to put documentation, and source code

[linknum23]

working on this in https://github.com/micro-nova/AmpliPi/tree/packaging_restructure