Delete unused entry point
services: Add StoreService

* Added StoreService with the following methods:
   - getStores
   - getStoreWithBottles
   - createStore
   - deleteStore

  along with accompanying integration tests.

* Introduced new dependency - Dozer.

  Dozer enables easy mapping between entity <-> DTO classes and greatly
  reduces the amount of required boilerplate.
maven: Introduce multiple modules

Current structure:
- root:
  - backend:
    - dal (entities & repositories)
    - service (dto & services)
Add out/ to .gitignore
service: Added mock infrastructure for service tests.
service: Add EntityNotFoundException throwing to StoreService
Merge branch 'master' into gwtp

Merge multi-module layout.
Simplify component scan