SpringAtom - #103

sa-wizards.js:
- added the code which dynamically sets disabled attribute for these entries which corresponding ReportableEntity and so Persistable (table) can not be directly linked with currently selected
- added the code which resets selection only upon dblclick event

ReportableEntityAssociation:
- simple java bean that itself is a map where master (ReportableBean#getId()) can be linked in query with children (ReportableBean#getId())

EntityDescriptors:
- added Guava cache instead of map
- added resolving EntityAssociation for given Class<?> where the class is used to retrieve matching EntityDescriptor and than associations for this descriptor