0.3.3

Added:

• New rever check command for checking that all activities can be run
  prior to actually performing a release. The intended workflow is:

  .. code-block:: sh

  $ rever check
  $ rever X.Y.Z
  

• The Activitiy class and activity() decorator have check
  and requires keyword arguments. The check parameter is a
  function for performing the necessary checks during rever check.
  The requires parameter is a dict that specifies necessary
  command line utilites and modules for the activity to be run.

• New Activity.check_requirements() method for checking requirements.

• New rever.authors.metadata_is_valid() function for checking if
  an author metadata list is correct.

• New rever.github.can_login() functions checks if the user can
  login to GitHub.

• New SAT solving module, rever.sat, for defining satisfiability problems,
  and a solve_2sat() function for solving 2-SAT problems.

• New rever.tools.download() and rever.tools.download_bytes() function
  for downloading URLs as strings and bytes respetively.

• New rever.vcsutils.have_push_permissions() function for checking if the
  user has push permisions on a remote repository.

Changed:

• All existing activities have been updated to include requires dicts
  and check functions as needed.
• The Authors activitiy can now be configured with $AUTHORS_INCLUDE_ORGS
  for whether or not it should include organizations in the authors list.
  Organizations are entries in the authors listing that have the is_org
  field set to True.
• rever.authors.update_metadata() now attempts to add GitHub identifiers
  if $GITHUB_ORG is set.

Fixed:

• Authors were not being added to the latest changelog release. now they are.
• Fixed bug where $REVER_VCS would be detyped as a boolean.

Authors:

• Anthony Scopatz