Week Start/End Resamping: WS/WE frequencies
There are a number of offset aliases listed here:
http://pandas.pydata.org/pandas-docs/dev/timeseries.html#offset-aliases

I'm currently trying to resample a timeseries where the buckets are return with the beginning and/or end of the week.  There are a number of Start Month/End Month frequency aliases.  Am I missing something or should we include Week End/Week Start resampling aliases as well?
