Added the beginning of a regex notebook.
Renaming regex to regex-intro since there will likely be more advanced/more topical notebooks in the future.
Changed the narrative a little to focus on processing just one file. I figure the multi-file discussion can go into another notebook. Wrapped up the discussion of extracting the date string and starting to focus on extracting all the info per line. That will introduce wild cards like * and +, as well as groups and the re.search function.
Maybe finished up intro regex notebook. I concluded with groups and stopped short of introducing re.search and MatchObject. I couldn't think of a good seque and it seemed like there was enough there already.
Added a table of contents to regex intro notebook.
Changed the markdown a little in the TOC to see if nbviewer renders it correctly.
Another try with the markdown in the TOC.
Merge pull request #2 from jiffyclub/regex

Regex notebook 1