This adds support for reading and writing WFS (including transactional) version 1.1.0. It also includes some minor changes to the GML format such as a writer for Envelope.
Add support for writing WFS GetFeature
Add reading of TransactionResponse
Read the metadata of a FeatureCollection
Add write support for BBOX filter
Add write support for Transaction
Add support for writing Native
Port over test case for multiple Query elements
Restore the exports
Add more typedefs for return objects
LGTM. I don't know the WFS protocol, and so can't commend on protocol aspects, but the code itself looks very good.
This is simply great. Please merge.