func delete() throws
Deletes one row, with an id
Presumes first property in class is the id.
The _rev (revision) property must be set as a safety mechanism.
func find(_ data: [String: Any], cursor: StORMCursor = StORMCursor()) throws
Performs a find using the selector syntax
An optional cursor:StORMCursor object can be supplied to determin pagination through a larger result set.
For example, `try find(["username":"joe"])` will find all documents that have a username equal to "joe"
Full selector syntax can be found at http://docs.couchdb.org/en/2.0.0/api/database/find.html#find-selectors
Remember that the selector object is [String:Any], not the raw JSON.