fixed the display of definition adjustments
Added a UserTank for model & its validations
Merge branch 'dev' into model
Merge branch 'dev' into model
added unit tests (within user and tank tests) for UserTanks
Fixed unit tests so there is no leftoever data in db
cleaned, refactored, & commented code
Added functionality & test cases for creating user tanks by tank
Merge branch 'dev' into model
added location and gatewat lists to AccountModel