0.2.6

Added:

• $GHRELEASE_PREPEND and $GHRELEASE_APPEND allows users to
  prepend/append a string to the GH release notes
• REVER_QUIET envvar. If True rever doesn't print during hashing

Changed:

• GitHub token notes now have unique identifiers, which prevents issues from arising
  with hostname clashes.

Fixed:

• Addressed issue with DockerActivity not being able to set it's code block
  correctly.
• Null repo fork creation fix for v1.0.0a4 of github3.py
• Fixed bugs in push-tag undoer.