Syntax corrections in extract.py #tested

Corrected bugs and improved output in extract.py

Summarization is now top sentence instead of top few, as due to sentence
boundary detection being imperfect, top sentence already might be an
entire paragraph.

Summarization appears successful, so we now may move on to test over a
greater dataset, and try to evaluate our rank results and summary.

Also small additions to .bat file

#TODO: Evaluation of results