tcp connection to communicate with sensor in daemon mode

[EmileCadorel]

This pull request is associated with the pull request on hwpc-sensor. I added the daemon report (tcp server), on the sensor.

Here I added client tcp to read from the sensor. And output tcp to write into a tcp server the result of the formula (power report, formula report).

So the new options are :

• For input, --input tcp -U url -P port -m model -n name
• For output --output tcp -U url -P port -m model The output url is for accepted urls.