make moving window functions uniform
due to working with time series its only natural that we provide a wide range of moving window functions a.k.a rolling functions.
To make this a nicer user experience to use this functions i would like to uniform the interface for this functions. Especially the parameter to such functions should be named, ordered and behave the same. Namely
window
min_periods
center
closed
should always be present an (as far as possible) behave the same.