Add and modify links for some forks in README.md
Add and modify links for some forks in README.md

* Add tmshn/cyg-fast
* Modify digitallamb/apt-cyg
* Add balanx/apt-cyg
* Add langlichuan123/apt-cyg
* Add Milly/apt-cyg
* Add 10sr/pac-cyg
* Modify nobuyo/medy
* Modify svnpenn/sage

kou1okada/apt-cyg