updated pom: using javax.validation 1.1.0.Final
updated entities for the person-user merge

* deleted the Person class with belongings
* SpotImage stores only a the path to the file, not the byte[]
* modified DB schema (for SpotImage)
updated EJB classes: moving toward to use only the DB

* deleted LDAP related search functionality
* added options to sync a few attributes to the DS via LDAP
* split up UserManagerBean into 3 separate beans:
	* MembershipManagerBean
	* GroupManagerBean
	* UserManagerBean
* introduced SearchManagerBean for search functionality, currently nothing is implemented
* removed every dependecy to LdapManagerBean
* introduced new exceptions as wrappers to framework exceptions
web services do not rely any more on LDAP

needs some specs and review!
removed every dependency to LdapManagerBean and Person from web layer

* only the api changed, implementation details need further attention
* some features have been removed, after review, they should be reimplemented
LdapSyncronizer implements AutoCloseable

now can be used with try-with-resources. JDK7 powwa!
fixed typo in exception for user duplication
ldap: removed syncing screen name. it's immutable. :)
using NotImplementedException instead of UnsupportedOperationException
where appropriate