Add contextData column to Data feeds

[#1]

At present Adobe Analytics data feeds do not contain the columns that contains all contextData sent with a hit.

Adobe customer care can provide you a data feed with this column so there is possibility to extract it from Adobe's back end.

It would be good to be able to have the column that holds the contextData be available in data feeds and live stream API so we can reprocess it how we want when we feed the data to our data base.