calibre: Added requirement for python-sip version greater than or equal 4.13.2
This update fixes the following issue for python-sip:
- bnc#793269: calibre doesn't work with newer python-sip version then 4.13.2
- Submitted by Kilian Petsch (kpetsch)
Fixed bugs
bnc#793269
openSUSE:12.2/calibre: Bug -- calibre fails to start up