Streamlined handling of syntax descs & alt advice.
Normalize handling of IANA lang subtag registry.
Slight reordering of Travis test targets.
Use promiscuous-ssl=on in example build script.
Up maxFileSize to 8MB b/c HTML spec has grown more.
Added initial (liberal) support for ARIA in SVG.
Made SVG <style> not require the "type" attr.
Updated changelog.
Added favicon.