File now found and incorrect readme instruction for word level selection

[10printhello]

when running the train.lua received the following error: "not found:No LuaRocks module found for util.WordSplitLMMinibatchLoader"

On inspection WordSplitLMMinibatchLoader was missing the ".lua" extention. Renaming the file with this extension fixed the issue.

Secondly the REadme suggested using "-usewords 1" to train using words rather than chars. The code is actually looking for the param "-wordlevel 1"