Used EntityManager instead of SessionFactory

This run without error. Further test needed for validation.
Removed Maven Hibernate Dependencies
Added PersistenceExceptionTranslationPostProcessor

Translate platform specific exceptions to Spring data access exceptions
Merge pull request #2 from invincibleelf/master

DevOpsDistilled Added in Main
Added DevOpsDistilled in Main
Merge pull request #3 from TheKojuEffect/master

Test Purpose
Deleted DAO packages

Eliminating DAO by using EntityManager
Deleted Generic Service classes
Removed all Generic Service dependencies
Merge branch 'master' into jpaImpl
Basic Formatting
Removed all persistence specific classes
Merge branch 'master' into jpaImpl

Conflicts:
	OpERP/src/main/java/devopsdistilled/operp/server/config/AppConfig.java
	OpERP/src/main/java/devopsdistilled/operp/server/service/ItemService.java
Added AppConfig for Client
Item set as only Entity
Removes EclipseLink Dependencies

Going to use Hibernate Persistence Provider
Add createItem() in ItemService

Basic ItemService implementation
Configure Hibernate as Persistence Provider for JPA 2
Configure JpaConfig, substitute package with AppConfig.class

Add PersistenceAnnotationBeanPostProcessor instead of packages in
AnnotationConfigApplicationContext
Rename AppConfig to AppContext