Corrected order of trainStrategy applications : removed possibility of parameter reset before dynamic example extracting

Removed pretrainedEmbeddings as a global parameter, instead submodules can now have their own pretrained w2v

mcd file is now longer needed, we can give mcd throught program argument, use the default one, or read it from conllu file metadata

Excluded parser from dynamic oracle. Set train mode to false when extracting examples. Set dicts to closed when extracting dev examples.