First oncleben31 version

First working version for @oncleben31 version:

• Duration is calculated using pool water temperature.
• Filtering schedule is around solar noon and split in two runs (1/3 - 2/3).
• Not used stuff currently removed
• Most part of the algorithms moved in a dedicated python library pypool_pump

WARNING this is early stage of developpement. Code not secured to be stable and breaking change could occur in next versions.