Removes link to O'Reilly PDF; adds link to Current PDF

- takes care of a concern reported via email

Remove also the PDF and add a redirect for it.

Change-Id: I508f600c18d3d34ff3a89686e51c7013736fabee
Fix dbconfig-common chapter for Icehouse

The script "mysql-remote-root" isn't in the openstack-proxy-node
package anymore, but in the "openstack-deploy" package, which does
not contain dependencies, which is a way more convenient for our
users. This patch fixes the manual installation procedure regarding
this issue.

Change-Id: I135fcf4eced517a5ee21998949f6ad9733500384
Backport: Icehouse
Clarify pip install section

The section contained links to python-novaclient in the pip install
section and mixed setup of clients and pypi. This patch completly
reworks the content and updates information for openSUSE and SLES.

Change-Id: I00dcb3203530dc7a52e2ae1368a52991f89b4908
Merge "Removes link to O'Reilly PDF; adds link to Current PDF"
Merge "Clarify pip install section"
Merge "Fix dbconfig-common chapter for Icehouse"