Missing Gravity: I2C DS1307 schematic and layout

I would like to get the schematic & layout for the Gravity DS1207 RTC module, but it looks like the link to the Github page is broken (https://github.com/DFRobot/DS1307_RTC/raw/master/Schematic%20&%20Layout.pdf). 

Would it be possible to provide the schematics?