Update CHANGELOG.md

Update CHANGELOG.md

Update CHANGELOG.md

Update CHANGELOG.md

Pass README.md and RELEASE_ENGINEERING.md through markdownfmt. Update…

… TOC.

Rename RELEASE_ENGINEERING.txt to RELEASE_ENGINEERING.md

Fix issue on OS X when creating a temporary file

    This prevents the "mktemp: too few X's in template
_stacklib_" error message from appearing when
adding another admin to blackbox and allows the command to successfully
execute.

    Related:
    rtomayko/shocco#5
    https://unix.stackexchange.com/q/87638/63283

BACKWARDS INCOMPATIBLE CHANGES:

* Using $BASEDIR to pass the location of the repo hasn't worked for a
  while. It has been removed.  Simply cd into the vcs repo before
  running a command.
BUG FIXES:
* .gitignore was being created in subdirectories instead of VCS root.
MINOR CHANGES
* _blackbox_common.sh: Replace change_to_root with change_to_vcs_root
* confidence_test.sh: Added more assertions and tests.

Remove irrelevant error check

Remove irrelevant error check