multimodel and mosesserver: instead of optimizing first model, select model by name.
multimodelcounts: use Word objects instead of strings in map (avoid costly conversion and string comparison)
allow overriding table filtering in config (required for multimodelcounts)
rename multimodel weights in moses server (harmonization with the new config format)
Merge branch 'master' of github.com:moses-smt/mosesdecoder