Integrate with radare.toxml #3

I think it will be interesting to join efforts and combine your deserializer with my serializer, so we can reuse tests and reuse common functions and such.

I also think that it will be good to have a stream support like sax.

• https://github.com/radare/v-toxml

Example: https://github.com/radare/v-toxml/blob/master/examples/fromvwxml.v