Version 1.3: Merge Integration

This PR is for review and tests.

It should fix issues #9, #20 and #22.

I've also added a better 'GET' detection (6fd0f5e1b502a13b7db1e8e8af1a5c8641b38b5c) and added Added X-Frame-Options and Access-Control-Allow-Origin headers (155659171535eda872c62c79ebdfb3cedc96d56e). I've tested it and everything seems to be working well.