apt-fast: Improve apt-get Download Speed

apt-fast is a shell script wrapper for apt-get and aptitude that can drastically improve APT download times by downloading packages with multiple connections per package. apt-fast uses aria2c or axel download managers to speed up the APT download time. Just like the traditional apt-get package manager, apt-fast supports almost all apt-get functions such as install, remove, update, upgrade, dist-upgrade etc. And one more notable feature is it supports proxy too.