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.
If you're gonna do an `inreplace` here it'd be good to submit this as a patch too. Also, you could also `inreplace` the Makefile and use `make install`.