Add multi-daemon support#13

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PinkFreud wants to merge 4 commits intopimoroni:masterfrom

PinkFreud:multi-daemon

Commits on Jan 23, 2021

Add -p and --pipe options to explicitly specify path to FIFO to plasma daemon and plasmactl client
pizzathehutt
committed

Commits on Jan 24, 2021

Clarify -p|--pipe usage in plasmactl usage output
pizzathehutt
committed
Fix pid and log file paths, and change how -p option is handled
pizzathehutt
committed

Commits on Mar 27, 2021

Add per-daemon default - now the plasma service will look for default-<pipename>.png before it tries "default.png"
pizzathehutt
committed