Added Javadoc to OrderDbStorage and Layer
Fixed bug in OrderDbStorage and added insert/select test.
Merge remote-tracking branch 'origin/dev' into dev-layersql
Added tests for OrderDbStorage
Merge remote-tracking branch 'origin/dev-model' into dev-layersql
Inserting and selecting orders with non-null values into the database
are working.
Database insert and select now working.
Added test for select/insert of multiple orders.
Merge branch 'dev-layersql' into dev