changes to a bunch of the wikipedia view code

changes to a bunch of the wikipedia view code

- Renamed the articles.txt to something more specific

Changes to both scripts:

- Updated filenames to match the new standard
- Reworked the logging code so that it can write to stderr by
  default. Because we can only call logging.basicConfig() once, this
  eneded up being a bigger changes.
- Caused scripts to output git commits and export to track which code
  produced which dataset.
- Caused programs to take files instead of directories as
  output (allows us to run programs more than once a day).

Changes to the wikipedia_views/scripts/fetch_daily_views.py:

- Change output that it outputs a sequence of JSON dictionaries (one
  per line) as per the standard we agreed to and which is what
  Twitter, Github, and other dumps do. Previous behavior was to create
  output a single JSON list object.
- A number of other small changes and tweaks throughout.