JSONParser: remove old JSON parsing code
wadindex: clarified note in example command
wadindex: close #58; split script into WADTools modules

- Removed VERSION declaration from wadindex, will be obtained from
  $App::WADTools::VERSION now, which is set by Dist::Zilla when a
  release is made
- Added a $my_name variable for use in log output
- Removed extra comments cruft from copy/pasting