Update website to GitHub
Use portageq to find out GENTOO_MIRRORS

The location of make.conf has changed to /etc/portage/make.conf so the
source command doesn't work. portageq is the proper way to query portage
information.
.gitignore MANIFEST
Add simple Makefile
Stop passing --check-certificate=false

The original idea was: If portage is verifying checksums anyway,
we can tolerate bad certificates in favor of more user convenience.

However, we may just be fetching the file for the very first time
(in case of an Ebuild developer) and would not notice a MITM attack.
So in that case, it makes a dangerous default.
Bump version to 0.7.2