[doc] Document the CORS options
[fix] Don't namespace options under CORS.
[fix] Don't send CORS headers for the client or other requests.
[fix] Also apply CORS headers to our client file.
[fix] Fix broken table due to new line
Revert "Revert "[major] HTTP Access Control (CORS)""

This reverts commit a83a5bd62a0bd96fa1396571d26cb2c097caa4ad.

Conflicts:
	transformer.js
Merge pull request #178 from primus/CORS

Cors