Altered the shopping model to use a weighted sum instead of a weighted mean for the recency of the quote.  No significant change.
Added a feature indicating when the last quote was for a customer's purchase.  If a customer never received a quote before purchasing this value will be 0.   I am hoping that this will identify customers which should/should not use the naive model.
Merge

Merge branch 'master' of https://github.com/nickwallen/kaggle-allstate

Conflicts:
	src/R/shopping-models.R
	submissions/red-swingline-predictions-shopping.csv