Resolved issues with cd-ing into a new directory to run the code. New dir name added to output filenames instead.
Add option to explicitly give an output directory, otherwise defaults to output/
Merge branch 'master' of https://github.com/s2ds-kpmg1/kpmg1

# By Elena Garcia Ramos
# Via Elena Garcia Ramos (1) and elenagr (1)
* 'master' of https://github.com/s2ds-kpmg1/kpmg1:
  Some updates
  updated bigrams
  update bigrams, deleted several entries