Move the repo files to /etc/yum.repos.d

The repo files will be saved as redhat-upgrade-<id>.repo in
/etc/yum.repos.d so that they can be used during post-upgrade scripts.
The repo files will be disabled by default.

Related: rhbz#1080966
New version 0.7.14
Add an option --cleanup-post to cleanup packages in post scripts.

Resolves: rhbz#1070603
Add a Requires for a sufficiently new yum

Resolves: rhbz#1084165
Disable screen blanking

Resolves: rhbz#1070112
New unofficial version 0.7.14.1