finished draft of LYRA lightcurve object.  Added in and tested directory option and overwrite option to main lightcurve object.
finished draft of LYRA lightcurve object.  Added in and tested directory option and overwrite option to main lightcurve object.

dpshelio/sunpy,Alex-Ian-Hamilton/sunpy,dpshelio/sunpy,dpshelio/sunpy,Alex-Ian-Hamilton/sunpy,mjm159/sunpy,Alex-Ian-Hamilton/sunpy,mjm159/sunpy