made custom splashscreen
finished Wizard for New Entities

added basic working version for Wizard to New Entities.
Right now they are based on 2 wizard pages:
InsertEntityNamesWizardPage.java & VerifyEntityNamesWizardPage.java
updated Commands for new Entitites

they extends from AbstractNewEntityHandler.java superclass
added add methods in DataProvider

addStudentGroup() is missing
changed dummy action TestAction2

using it for refreshing the Entity Views