added title as a standard field attribute
added basetype indication to all fields
cleaned up field definitions a bit
better field construction from serialized definition
fixed reconstruction error
allow fieldtype as a synonym for __type__
improved field description generation
a small fix for the email field
fix for element serialization
a small fix
added ignored_values option to Enumeration field
added set_nested_value utility function
added support for common fields in polymorphic structures
nice import for Email field
implemented scheme surrogates
added support for object extraction to Structure field
some additions
fixed a couple of annoying issues with the parameters described for Email fields
fixed surrogate.construct()
implemented interpolation for surrogates