[Parsing] Automatic field creation for the remaining data

[aminya]

After a type is defined using @aml and we parse a xml/html file, there may be some parts of that xml/html string that are missing in the @aml. We should provide either

1. automatic creation of fields for these parts of the string that are missing.
2. allowing the user to xpath or addelm later.

[aminya]

Having Dict support allows having all the all/rest of the data that are not captured to be stored in a Dict.
#94