- Use PreReq for own packages instead of Requires(pre)

- Let texlive-biber require perl(LWP::UserAgent) to be able to
read system based certificates
- New rpm had removed "prereq" flag from installation script bits
that is that `Requires(prereq)' is not valid anymore :(((

- backward compatibility Provides: texlive-bin-dvilj (SR#175836)

- As lcdf-typetools does not support kpathsea nor search below
texmf tree build the texlive-lcdftypetools(-bin) packages again
and let them conflict with the lcdf-typetools package.

- Let texlive-pdfjam require texlive-pdfpages (bnc#814804)
- Let texlive-pdftools require texlive-pst-pdf (bnc#812286)
- Correct license boolean for biber packages
- Let texlive-tex4ht-bin conflict with ht due path /usr/bin/ht
- Let texlive-lcdftypetools(-bin) packages depend on lcdf-typetools
package or conflict.

- Change Obsoletes from < 2012+subversion to <= 2011 (bnc#811162)
- Let mathdesign require tex(texnansi.enc) (bnc#808731)
- Let biber-bin require perl(Text::BibTeX) (bnc#811258)
- Do not require xfs as we do not use xfs at all, otherwise we
have to add some more lua code in the %post scriptlet.