git-stats.sh: Days since first commit graph (fix 83027388)
git-stats.sh: Days since first commit graph (fix 83027388)

Fix commit 83027388670b18143593eef5f171925c97464a3a.

* Uncomment commit message word count graph (I had commented it out
  because it takes a long time)
* Turn the 'days since first commit' graph back on an remove debug lines
* Remove spaces around date parse call in Ruby line
* Comment out Bash pipefail settings. This was causing the 'days since
  first commit' graph to fail and was part of the reason for the issue I
  was seeing in 83027388670b18143593eef5f171925c97464a3a. The trouble
  was that the `git log --pretty` call was returning a non-zero exit
  code (as far as I can tell), causing the program to exit before
  processing all the contributors. Remove the Bash settings as a stopgap
  because the script seems to work fine now.

teddywing/git-stats