Boolean serialisation about yaxlib

[danpowell88]

Looks like XMLUtils.ToXmlValue could be modified with an addtional case

case "Boolean":
                return XmlConvert.ToString((bool) self);

This does break some of the existing tests that are using the uppercase booleans however

[superoctave2]

I've noticed this as well; it causes problems when the XML emitted by YAXLib has to go through a validator. Would you accept a patch for this issue if one was submitted or do you consider the existing behavior intended/desirable?

[304NotModified]

@axunonb @NKnusperer I think this should be fixed for V3, do you agree?

Should we make it an option to fallback to the old (incorrect) Pascal cased boolean values (True, False)

[axunonb]

Should we make it an option to fallback to the old (incorrect) Pascal cased boolean values (True, False)

Make deserializing Pascal cased booleans work, but for serializing follow the xml specs now?

[NKnusperer]

Like @axunonb said we should preserve backwards compatibility by supporting deserializing pascal case and serialize correctly.