[chef] install.sh changes and CHEF-4825 are live

[Lamont Granquist < >]

Some major changes to install.sh were just shipped a few minutes ago.  
There's a chef ticket open which details all the changes:

https://tickets.opscode.com/browse/CHEF-4825

Everything that worked before should continue to work (please cut a bug 
if it doesn't).  The major visible changes are:

- Fixes SuSE/OpenSUSE support
- Fixes new versions of operating systems like Ubuntu 13.10 and Mac 10.9
- Support for some variants like linuxmint that were difficult to do 
before, now supportable
- Bug fixes for old Solaris
- Conversion of install.sh from bash script to very old, 
sol9-compatible, /bin/sh heirloom shell syntax
- install.sh now checksums the downloaded package via sha256 with a 
fallback to md5
- Ability to track 10-stable via partial versions (11.8 or whatever also 
works if you want that):

curl -L https://www.opscode.com/chef/install.sh ;| sudo bash -s -- -v 10

- Ability to save to a user-supplied filename instead of /tmp randomness:

curl -L https://www.opscode.com/chef/install.sh | sudo bash -s -- -f 
/root/chef.deb

I also open-sourced the code a few weeks back:

https://github.com/opscode/opscode-omnitruck

Docs are probably still out of date, will be fixing shortly...