Fixed PL translation

Merge pull request #124 from bruxy70/development

Polish translation

Polish translation

Thanks to @KrzesloSzatan

Polish translation

Merge pull request #122 from bruxy70/development

Polish translation

Fix Options Flow

Fix

#118 - fixing options flow (changing parameters configured through web GUI)

New

#117 support Norwegian

Monthly frequency period, group frequency fix

New feature

#104 Added period configuration option for monthly frequency, allowing a schedule on odd/even months, quarterly, etc.
See the documentation

Fix

#103 Fixed updates for group schedule. In some cases, the group sensor got updated before the sensors in that group, so that the sensor was out of date for 1 day. This is now fixed - the group sensor will wait with the update until all child sensors are updated.

Period parameter for monthly frequency

New feature

#104 - using the period parameter, you can now configure monthly collection that occurs every n months, like odd or even months, or once per quarter.

See the documentation

Better update of group sensor updates

Improvement

This should be waiting with the group sensor update until the grouped sensors are updated.
The previous beta was updating the group sensors constantly. This goes back to once per day update.

Do not block updates for group frequency

Fix

I update all sensors only once per day. For group frequency, the sensor now updates at every refresh. This should hopefully fix the issue #103

Adding Dutch sensor translation

Thanks to @jcassee

Timedelta change

Fix

Change from using datetime.timedelta to dateutil.relativedelta. It apparently better handles leap year.
Fixed issue #98