Add `requests` as a required dependency for Debian installations.
`python-requests` is also available through squeeze backports
Install procps and pciutils which allows Docker bootstraps

See https://github.com/saltstack/salt-bootstrap/issues/366#issuecomment-39666813
The RedHat family now also installs `requests`.
Arch also installs `requests`
Ubuntu now also installs `requests`
Wording change
Fedora now also installs `requests`
`requests` is also installed on FreeBSD
Install `requests` in openSUSE
Install `requests` in SuSE
Install `requests` in Gentoo
Update readme with info required to identify new distributions.
Install `requests` in SmartOS
Update changes log
Removed quotes which prevented globing.
Improve sentence.
On versions higher than 12.04
Assure proper versioning with external Salt repositories.

In case Salt is getting installed using a repository which is not
SaltStack's Salt repository, add the latest as a remote and fetch tags
from there for proper versioning.
Merge pull request #369 from s0undt3ch/develop

Add requests as a dep