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e.g. LHAPDF_DISALLOW_FLAVOUR 5 -5;

Add documentation blob to event output for MC@NLO S events, which contains the original ME particles before the MC@NLO emission.

Original message: Address 1.) of #365

For taus produced in hard decays the spin correlation information was not passed on to the hadron/tau decay module, since the hard decay handler treated them as stable particles.

svn merge -c 29280 branches/rel-2-2-1 .
-> EWVirt KFactor and bugfix

Original message: Add missing OrderQCD/EW implementations

Original message: Add missing OrderQCD/EW implementations

Original message: Fix handling of NaNs in hard process reweighting

Original message: Fix handling of NaNs in hard process reweighting

-> fix uninitialised pointers in Virtual_ME2_Base

add GenCrossSection to HepMC::GenEvent created by SHERPA::FillHepMCEvent

BUGFIX: LocalKFactor call of Differential needs mode 128 to generate a new colour point for the case where the amplitude comes from Amegic, but RS/R (or BVI/B) are calculated by Comix. Fixes eta asymmetry in diphoton production with MEPS@NLO.

Original commit message:

Add namespace specifications for instantiations

Add namespace to explicit class template instantiations, as otherwise clang
sees the omission as an error, if using

    CXXFLAGS="-std=c++11 -stdlib=libc++".

This enables compilation with clang linking to Rivet 2.5.0, which requires C++11.

For the same reason, an implicit cast has been made explicit and some weird
rvalue construction has been replaced with code that is readable and compiles.

This only affects AlphaS reweighting with parton shower emissions.

This fixes compilation when --with-lhapdf is not defined