Updated UnitOfWork

Added newCustomers ArrayList
Added registerNewCustomer method
Added commit method — without functionality

Reviewed by: Christopher
Merge branch 'DataSourceKasper'

		functionality added for
		controller, Booking
		Unitof work and Datamapper
Modified Mapper Classes

- Added getMethod in different Mappers
   - Both for all and single/specific rows

Rewieved by: Christopher
Merge branch 'DataSourceKasper'

	datamapper hotfix
	Rewiewed by: Simon