HouseFly 2.18.0 — rows of numbers, one channel each

A state made of named rows of numbers, m1:21,18,13;s1:0,0,80, is now read as
one channel per value, and each channel adapts to its own range like any
numeric sensor. Home Assistant has no array type, so this is how a device
publishes several readings at once; FrontPath sends both radars' per-gate
energies this way, thirty-six numbers a second.

Read as one string it was a word, a new odour every second. And one shared
scale would not do either: a gate over swaying plants sits near 100 all day
while one over open path sits near 20, so a person at the quiet gate would
vanish into the noisy gate's range. Per channel, the fly learns what the wind
does to each gate and a person at an unusually quiet one is new.

A row name has to start with a letter, so a clock time such as 07:45 is
still a word. Two to sixty-four values per entity, so one sensor cannot crowd
out the house. Suspects name the row and position
(sensor.gate_energies#s2#7). Four new checks in section 8 of
tools/validate.py.