Use SiegeLord/RustCMake for rustdoc related to #24.
Merge branch 'rust-servo' into rust-0.8: Use SiegeLord/RustCMake for rustdoc related to #24.
Revert "Merge branch 'rust-servo' into rust-0.8: Use SiegeLord/RustCMake for rustdoc related to #24."

This reverts commit 8fc7e45f335af1b424613d7486550a701e4f2b8d, reversing
changes made to ef093086a6c81c4f4ea250fc670a4cf0222b9a3c.