GUI:  UX for facility administration

- Added filtering above TaskResults.
- Display type of destination as UpperCase.
- Inform, that "Services destinations" define, where service configuration
  is propagated. Show warning on delete hosts/destinations, informing
  about services propagations.
Core: fixed wrong exception in addServiceToPackage

- the method addServiceToServicesPackage now throws
  ServiceAlreadyAssignedException instead of InternalErrorException
  when the service is already assigned to the package
Core: fixed checkAttribute[s] for VOs

- now the checking of an attribute for VO runs only when the attribute is not null
  or is truly required (Task #1527)
Added right licence.
Merge pull request #241 from tauceti2/master

Added right licence.
GUI: improved adding facility destinations

- Updated dialog for adding services destinations.
  Suggest existing hosts when destination is HOST type.
  Check for valid email format when MAIL and SIGNED_MAIL
  destination format.
Merge pull request #242 from zlamalp/fac_setting

GUI: UX for facility administration
Merge pull request #238 from jirmauritz/servicePackages

Core: fixed wrong exception in addServiceToPackage
Merge pull request #237 from jirmauritz/checkAttribute

Core: fixed checkAttribute[s] for VOs
GUI: custom error message on AddServiceToServicesPackage

- Display custom message since same exception is used for
  assigning service to resource, which is not the case
  of AddServiceToServicesPackage.

- Source format of some classes.
Merge pull request #243 from zlamalp/assign

GUI: custom error message on AddServiceToServicesPackage