…igin

Referer policy strict-origin and strict-origin-when-cross-origin changes have been implemented. Relevant unit test cases have been added. Enum for RefererPolicy has been added to hyper codebase and v 0.9.11 of hyper contains these changes.

This commit also contains changes related to upgrade of hyper from v0.9.10 to v0.9.11. Other dependencies changed are rayon, utils, num_cpus.