Completed spike of services

Created api for hopBillService for getting and storing hopBill
Made the HopBillService responsible for including the changes from the design
Coalesced design attributes into a object
Fixed unit tests and refactored hopBill

* Renamed HopBillService to HopBillStore
* Deleted fromJSON and refactored HopBill constructor
* Fixed Lint Errors
Fixed scenario tests

* Changed design model references to design object
* Removed Safari from e2e tests - doesn't play well with others
Extracted BeerDesign class

* Returning it from the design service when local storage doesn't exist
Completed services refactoring

* Made BeerDesignStore service similar to HopBillStore (renamed from design service)
* Changed a bunch of tests
* Moved buGu method to BeerDesign object