[Scitech] Updating from f17 to f18 as well as the f17 sagemath packages in pcpa.fedorapeople.org

[Paulo César Pereira de Andrade]

  I followed the procedures at
https://fedoraproject.org/wiki/Upgrading_Fedora_using_yum#Fedora_17_-.3E_Fedora_18
and after a reboot, updated my sagemath x86_64 repository.

  I had a few f15 plexus&maven packages that appeared to cause
upgrade problems as well as ffmpeg-libs, but this was enough
for me to convert a f17 computer to f18:

$ sudo yum erase sagemath
$ sudo yum erase plexus-appserver plexus-runtime-builder
plexus-maven-plugin maven-shared plexus-xmlrpc ffmpeg-libs
$ sudo yum update yum
$ sudo yum clean all
$ sudo yum --releasever=18 --disableplugin=presto distro-sync
$ sudo rpm --rebuilddb

If you previously had a /etc/yum.repos.d/sagemath-f17.repo, please
now use http://pcpa.fedorapeople.org/sagemath/sagemath-f18.repo

There is a Singular update, but the same build should be available
as an update in a few days
https://admin.fedoraproject.org/updates/Singular-3.1.5-3.fc18
and I just opened a bug report to update f18 to the same numpy in rawhide
https://bugzilla.redhat.com/show_bug.cgi?id=896311

Thanks,
Paulo