Added functionality for Items and Projects to aggregate stats. Refs #61 and #62
Added JSONField plugin. Closes #59.  Use JSONField to store aggregate stats for items, collections, and projects. Refs #60 #61 #62
Added initial migrations data and slightly tweaked the .gitignore file
Added utils file for use with aggregate stats functions from previous commit. refs #60, #61, #62
Merge branch 'master' into aggstats
Fixed bug with JSON field and tests for aggregate stats functions. Also added migration for new JSON fields. Closes #59, Closes #60, Closes #61, Closes #62.
Modified stats functions in utils file. Added tests for the functions. Created a management command to run stats updates. Refs #63
Fixed bug with bulk stats functions. Refs #63
Fixed bugs with update_stats mgmt cmd and test. Closes #63
Added check for no options in update_stats mgmt cmd
Modified templates to use aggregate stats. Closes #47. Also fixed bug with pagination in templates
Fixed bug with merging JSON stats and added test for it
Adjusted models and utility functions to handle cases where an Item has no bags or one bag, and where projects and collections have no items. Added tests as well. Closes #63
Merge pull request #68 from gwu-libraries/aggstats

Aggstats