kore 1.2 (new formula)

This commit add's a new formular to Homebrew for Kore. Kore is a fast
SPDY capable web server for web development in C.

Look at https://kore.io/ for further information.
The project is not mine, so the only way for me is to create an issue or a pull request for Kore. I will do that later this day, but I can not tell how long this will last.