Revert "Update for plugin changes"

This reverts commit 3e6048c9ca4c959d4bc7f9ff6313ee76146c7171.
Revert "Upgrade to rustc 0.11.0-pre (e55f64f 2014-06-09 01:11:58 -0700)"

This reverts commit 4a6c17cf9bf11e9a8911fe20fb8ae7ab0a011881.
Fixes for servo rustc version