tex2lyx/Preamble.cpp: support 2 math fonts

- support for kurier and iwona as math font
can also go to branch
tex2lyx/text.cpp: support for \nameref

\nameref is not recognized

should be backported to branch
Merge remote-tracking branch 'github/build-bot-master' into bleeding-edge-master
2014.11.07-01.00