Project: duracloud
Issue DURACLOUD-444: Cumulative storage report 
This task is to add an additional storage report that is a cumulative on-going report which is updated each time a new storage report completes. The information in this report will be an entry for each completed storage report that provides the top level report information. Mime type information would be left out, and other information in the detailed report may be excluded as well. The goal of this report is to be able to create graphs that show the change in content stored over time. This report could work like the completed services report in that it could be cycled to start a new file monthly. Information should be included in the cumulative report that allows for the creation of links to the detailed reports as well as cross-links to the detailed report charts. This could just be the detailed report content ID.
Story points: 3