The Wire.endTransmission() should not be used together with Wire.requestFrom().

In the file "D1mini_HelperClasses/datalogger_classes/D1_class_DS1307.cpp" there is a Wire.endTransmission() after the Wire.requestFrom(). That Wire.endTransmission() can be removed.
Explanation: [Common-mistakes#2](https://github.com/Koepel/How-to-use-the-Arduino-Wire-library/wiki/Common-mistakes#2)