almost got #105 working, one tests still fails
#105 - exclude only private nested classes from auto mapping
fixing #105 - only public nested classes automapped by default
second attempt to get #37 working
added iteration over all implementations of IAutoMappingOverride - so far all existing tests pass
now AutoPersistenceModel recognizes multiple mapping overrides when declared on the same type
Merge branch 'anotherPassAt37th' of https://github.com/chester89/fluent-nhibernate into chester89-anotherPassAt37th
Merge branch 'issue169' of https://github.com/chester89/fluent-nhibernate into chester89-issue169