minor change
resolved some transient dependencies...upgraded wherever possible
SpringAtom-#6 Data layer [Hibernate]

basically changes are due to different approach taken to validate date
now it is basically based on Spring validators due to requirement of having method parameters validated
SpringAtom-#17 DataAccessLayer for SpringAtom

added validating for method arguments and return values
SpringAtom-#5 Unit tests for DataLayer

tests fixed applied for new constraints
SpringAtom-#6 Data layer [Hibernate]

close #6

SFreeSlot is a bean that is not implicitly included in data model but support business requirement for free slots between appointments
SpringAtom-#17 DataAccessLayer for SpringAtom

close #17

must be resolved and investigated in #23

free slots supports
closing
SpringAtom-#5 Unit tests for DataLayer

SFreeSlots tests
must be investigated in #23