KeyNotFound exception in Dommel resolvers

[henkmollema]

Accessing an entity map for a type which has not entity map results in a KeyNotFound exception due to the fact that an indexer is used without a ContainsKey check:

var mapping = FluentMapper.EntityMaps[type] as IDommelEntityMap;

TryGetValue should be used here.

[henkmollema]

Fixed with 7ea72fc.