-Parent Pom unified
-ScalaStyle corrections

Merge Jona's repo:
-Refactor LoanManagement
-TDD: LoanManagement/LibraryUser/LibrarySystem
-Refactor Builders
Added needed dependencies for Spring Scala, Hibernate, HSQLDB and Jetty
Merge pull request #9 from cravacuore/develop

Merged repos + Refactor