Implemented HasMappingFor!
NamespaceMappers is now actually just mapping namespaces - the old meaning of it is a PathToNamespace mapper - hence the rename.

Basically up and running with the mapping of C# namespaces to JavaScript using the StringMapper - proxies are now generated accordingly.
Honoring the namespace when specifying the type of the readmodel for readModelOf and query during proxy generation
Fixing a few specs - making them run more independent from each other!