Wrote preliminary version of ask.py

Picks C*N sentences from the article file and turns them into questions.
Requires the KenLM module in order to operate, as well as the
BrownCorpus.binary file.  The location of the corpus file should be in a
directory "corpus" under the main project directory.
Merge branch 'master' of https://github.com/ercgn/11411-proj