changelog update
make protocols optional
Make passing protocols to applications optional.

Only to be used with NullServer
minor fix.
Implement XmlData
make sqlalchemy map types under xml modifiers as well.
minor.

actually, can't be minorer. I mean, it's the minorest possible.
we don't need this anymore. I hope.
fix custom decimal errors in xml and friends. #229
Merge branch '2_10'
Merge branch 'master' into async

Conflicts:
	spyne/protocol/xml/model.py