Tokenize sentence and look up correctly from dictionary.

The sentence is now tokenized and can be looked up against the dictionary,
get returned and then have all definitions written out ot the output
file.

There are still a lot of issues, need to look up against Kanji only
if the work contains Kanji, and look up against reading if the word
only contains kana.

Also need to check the tokenizing code as it seems that it can't
tokenize conjugated verbs properly.