a function to fold lightcurves using a given eclipse ephemeris (eclipse Data)

[pkundurthy]

Folding and binning lightcurves can amplify weak signals, and make it easier to confirm visually.

• add a function to fold lightcurves by a given eclipse phase
• the appropriate module for this may be func.py or postqats.py

[nancyth]

See most recent update to func.py

[pkundurthy]

nice!!