initial implement for inline background
Implement DOMImplementation::createDocumentType

Implementation according to spec:
http://dom.spec.whatwg.org/#dom-domimplementation-createdocumenttype

Closes #1489.
auto merge of #1497 : brunoabinader/servo/domimpl-create-document-type, r=Ms2ger

Implementation according to spec:
http://dom.spec.whatwg.org/#dom-domimplementation-createdocumenttype

Closes #1489.
DocumentType does not need to know about quirks mode

TSIA. Closes #1498.
auto merge of #1499 : brunoabinader/servo/documenttype-remove-quirks, r=Ms2ger

TSIA. Closes #1498.
Reorder changes in add_child to be correct.
auto merge of #1501 : Ms2ger/servo/add_child, r=jdm
Handle GLFW initialization failure

I hit this when trying to run servo in an ssh session. It hit an rtabort with
"fatal runtime error: thread-local pointer is null. bogus!" The exit is
required because at this point, the runtime is in a very weird state, and a
fail is going to explode even more violelently than the original unwrap did.
auto merge of #1502 : cmr/servo/handle_init_error, r=pcwalton

I hit this when trying to run servo in an ssh session. It hit an rtabort with
"fatal runtime error: thread-local pointer is null. bogus!" The exit is
required because at this point, the runtime is in a very weird state, and a
fail is going to explode even more violelently than the original unwrap did.
some refactor & add comment
auto merge of #1494 : ksh8281/servo/inline_add, r=pcwalton

initial implement for inline background
it makes same result in "src/test/html/inline_bg_color_simple.html" with firefox