Merge pull request #598 from isuftin/master

Layer ribboning and all of the fixes that have to do with layer ribboning
fixing weird ClassCastException
Merge pull request #599 from davidmsibley/master

fixing weird ClassCastException
Merge pull request #600 from isuftin/master

Update to readme.md and using walker's new data model
database schema changes and test_data updates
updated Item with new rows
added displayed_children to loadData and rollback
Merge canonical/master
Merge pull request #601 from jiwalker-usgs/master

added additional properties to item, also added sandy intermediate layer
Moved files around to clean up the structure of the application
Merge branch 'master' of https://github.com/USGS-CIDA/coastal-hazards