CORE: fixed javadoc in API for getMembers() like methods

- fixed javadoc in API for getMembers(), getRichMembers() and
  getRichMembersWithAttributes() methods in Members/GroupsManager.
  Javadoc described methods using pageNum/pageSize, which are
  long gone.
New methods for addDestination and addDestinationsDefinedByHostsOnFacility

- method addDestination for list of Services
- method addDestinationsDefinedByHostsOnFacility for listOfServices
- method addDestinationsDefinedByHostsOnFacility for only already assigned services on facility
- helping private method addDestinationEvenIfAlreadyExists which do not throw exception if destination already exists, only return this destination.
- basic tests for all three methods
Merge pull request #102 from stavamichal/addDestinations-newMethods

New methods for addDestination and addDestinationsDefinedByHostsOnFacility
Merge pull request #101 from zlamalp/core

CORE: fixed javadoc in API for getMembers() like methods