Implemented logic for setting a user's tanks and a tank's users
implemented logic for auto-creation/updating of sensors during definition creation
Cleaned up data access portions of the models
Merge branch 'dev' into model
Implemented logic to set up the Default Definitions
implemented logic to create the lookup points during definition creation
implemented logic for auto defaulting definitions upon creation
updated ViewModels to use post-processing logic instead of pre-processing validations situationally