Current deployment crashing when a non cached URI request for date range of stat or summary role is issued.
Inside of filterMementosForDateRange(), archivedMementos array is emptied instead of deleting mementos not in the date range. This is due to the current date compared was compared as a string instead of a Date object.
Fixed minor bug that was not generating a histogram cache file in case of a non cached URI request of stat or summary role. This bug would possibly lead to a crash.