Add a spec-incompliant load event.
Make --enable-debug turn on full debugging information, and --disable-optimize disable all optimizations.
fix #1211: for table-related elements, handle temporarily as 'block' display intead of 'inline' display
auto merge of #1216 : june0cho/servo/temp_fix_tableflow, r=kmcallister

In order to fix the wikipedia error, I temporarily change the display property of table-related elements to 'block' instead of 'inline'.
When table is implemented, it should be changed to proper value.

@sonwow
@brson
auto merge of #1214 : jdm/servo/gdbready, r=larsbergstrom

...timize disable all optimizations.
Initial support for Attr and namespaces.
auto merge of #1213 : jdm/servo/loadevent, r=kmcallister

It's good enough for now, since we don't track document resources at all. Should be good enough for #841.
auto merge of #1218 : jdm/servo/attr, r=kmcallister
Make DOMString represent a non-nullable string.
Don't pass nullable strings to native DOM methods that want non-nullable strings. Fixes #1207.