Back-end update

[ianbstewart]

It looks like Google changed the back-end for returning n-gram data, and now the results are generated in a different format. I had to replace a line in getngrams.py to fix it.

Original (line 29):

res = re.findall('var data = (.*?);\\n', req.text)

New (line 29):

res = re.findall('ngrams.data = (.*?);\\n', req.text)