separated param_initializers.h into h and cpp
separated param_initializers.h into h and cpp

DianaDespa/marian-train,emjotde/amunmt,emjotde/amunmt,DianaDespa/marian-train,emjotde/amunn,marian-nmt/marian-train,afaji/Marian,emjotde/amunmt,marian-nmt/marian-train,emjotde/Marian,emjotde/amunmt,emjotde/amunn,DianaDespa/marian-train,marian-nmt/marian-train,amunmt/marian,afaji/Marian,emjotde/amunn,marian-nmt/marian-train,emjotde/amunn,DianaDespa/marian-train,DianaDespa/marian-train,emjotde/Marian,amunmt/marian,amunmt/marian,afaji/Marian,afaji/Marian,marian-nmt/marian-train