Less spammy core tests: They don't print PASSes now, only logs and failures.
`core:image` and `core:encoding/xml` tests also find their assets relative to `ODIN_ROOT` now.
A from-scratch XML implementation, loosely modeled on the [spec](https://www.w3.org/TR/2006/REC-xml11-20060816).
Features:
- Supports enough of the XML 1.0/1.1 spec to handle the 99.9% of XML documents in common current usage.
- Simple to understand and use. Small.
Caveats:
- We do NOT support HTML in this package, as that may or may not be valid XML.
If it works, great. If it doesn't, that's not considered a bug.
- We do NOT support UTF-16. If you have a UTF-16 XML file, please convert it to UTF-8 first. Also, our condolences.
- <[!ELEMENT and <[!ATTLIST are not supported, and will be either ignored or return an error depending on the parser options.
TODO:
- Optional CDATA unboxing.
- Optional `>`, ` `, ` ` and other escape substitution in tag bodies.
- Test suite
MAYBE:
- XML writer?
- Serialize/deserialize Odin types?
