See merge request !61

This way the PLC program can handle the exception accordingly
rather that simply hide it as till now.

Update CLI arguments' descriptions.

See merge request !60

See merge request !59

Add DTS file for STM32MP1 based olinuxino-lime board.

(for testing purposes).

configuration outside PLC project).

See merge request !58

beremiz-runtime.

- allow to mount with easy solenoid itself
- better dimmensions