Dict data support

[aminya]

• Creation
• Extraction/Updating

We should allow a field to be a Dict. Having a Dict as a filed means that user can use Dict instead of a struct to define/parse their html/xml data.

[aminya]

Static extraction isn't possible since the html names (keys for a Dict) are not known beforehand. We can probably fill a Dict dynamically with the rest of the data that isn't captured in other fields.
or provide a Dict like API data access directly from aml.