Add support for closing the window with window chrome or escape key.
Remove unused -z opt
auto merge of #576 : eschweic/servo/master, r=pcwalton
Fix silent failure of make clean-servo

Brace expansion is a bashism and doesn't work everywhere (for example, on
Debian where /bin/sh is dash).
auto merge of #578 : kmcallister/servo/clean, r=jdm

Brace expansion is a bashism and doesn't work everywhere (for example, on Debian where /bin/sh is dash).
Merge pull request #569 from metajack/glfw-close

Add support for closing the window with window chrome or escape key.
WIP iframe handling.
refactored url handling code in script task to be more idiomatic
fixed navigation bug