Fix issue 234: machine readable format for asetekpro pump

[mcombell]

Proposed changes

This commit adds support for the --machine option to the asetekpro pump so that it produces machine readable output for the values of the temperature, fans and pump.

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

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Further comments

The fix was to simply add calls to the msg_machine() method similar to what already exists in the hydro_asetek.c file.

I have tested this with a H150i Pro and it produces output like:

temperature:0:33.70
fan:0:0:604:0
fan:1:0:618:0
fan:2:0:600:0
pump:2:2820:0

This change should work with other devices that use the asetekpro pump