Version Bump. Adds CHANGELOG
Documentation Improvements
Merge pull request #82 from CrackerJackMack/dns_cleanup

DNS Consistency update
Minor bug fix (mostly for devs)

* --format now defaults to table if isn't set to anything from docopt.
  This happens if [options] is not included in the usage for a command.
CLI: fix bug in helpers.no_going_back()

helpers.valid_response() expects a list of str for matching true values. no_going_back()
now casts the confirmation value to str() before passing it to valid_response()