Added a dateobs TimeFrameAttribute parameter to HelioGraphicStonyhurst. It will be used to calculate the Carrington offset from within the class. Tests not passing right now.
Added a dateobs TimeFrameAttribute parameter to HelioGraphicStonyhurst.
It will be used to calculate the Carrington offset from within the class.
Tests not passing right now.

dpshelio/sunpy,Alex-Ian-Hamilton/sunpy,Alex-Ian-Hamilton/sunpy,dpshelio/sunpy,dpshelio/sunpy,Alex-Ian-Hamilton/sunpy