Add right floats and fix bug where max_y was not being set
Fix float placement bugs & add hacky non-percen heights to blocks.
Add test and address comments
Stop crashing
Semi-correct text wrapping
Fix rebase fallout
Line breaking around floats
auto merge of #585 : eric93/servo/floats-2, r=metajack

Everything except for floats in an inline formatting context and clear.
Bump rust-mozjs pointer to the merge commit.
Move rust-auto-clean-stamp into the rust build dir.

This is needed so that it's backed up and restored along with the rust build products.
auto merge of #586 : metajack/servo/auto-clean, r=jdm
DOM bindings: Autogenerate list of prototypes and binding registration goop.
auto merge of #577 : jdm/servo/autogen, r=jdm,metajack
auto merge of #587 : eschweic/servo/master, r=metajack

This fixes a bug that would sometimes trigger a fail! when the window was resized.