[Falcon] Added support for data pass-through to FPD on configuration port.

(cherry picked from commit 6a7b36c9ff865dd2d176793c6324bc5dccb32a3b)

Conflicts:
	src/falcon.c
[CLI] Add usage info output to fpp CLI helper
[Falcon] Add in code to detect Falcon hardware on SPI port

Also add a "fppd -H" command to detect hardware from the command
line so that we can eventually auto enable the 'FPD' setting in the UI
for new users.
[Falcon] Fix bug in Falcon hardware detection
[Network] Disable Power Management on wireless network interface

Power Management was causing occasional disconnects, so explicitly
disable it for now when we configure a wireless interface.
[Core] Set the PATH for Event scripts

Determine where we were executed from (/opt/fpp, /home/pi/fpp) and set
the PATH accordingly to include the scripts and bin or src directories.
[CLI] Make fpp send command timeout 2s instead of 0.5s.

Some commands take longer than 0.5s to complete and fpp's SendCommand()
function was timing out after 0.5s causing false errors or unreported
status on the command line.