added betfair interpreter spec
added interpreter#type_map with interhome spec

a first start to replace the mapping crap in wasabi and savon.
#type_map raise instead of ignore
no need to defer subtype mapping

-1 complexity \o/
moved #type_map specs to a separate folder
#type_mag ignore annotations
basic support for simple type enumerations
split simple type parsing
introduced some helpers to fix sax parser specs