Release v2.0.0

• Added: audbackend.interface sub-module
  including an backend interface base class
  audbackend.interface.Base,
  and the three interfaces
  audbackend.interface.Maven,
  audbackend.interface.Unversioned,
  audbackend.interface.Versioned
• Added: audbackend.backend sub-module
  including the backend base class
  audbackend.backend.Base,
  and the two backends
  audbackend.backend.Artifactory,
  audbackend.backend.FileSystem
• Added: audbackend.backend.*.copy_file()
  and audbackend.interface.*.copy_file()
  methods
  to copy a file on the backend
• Added: audbackend.backend.*.move_file()
  and audbackend.interface.*.move_file()
  methods
  to move a file on the backend
• Added: validate=False argument to the
  copy_file(),
  get_archive(),
  get_file(),
  move_file(),
  put_archive(),
  put_file()
  methods in audbackend.backend.*
  and audbackend.interface.*.
  If True
  the checksum of the resulting file is checked
• Added: audbackend.backend.*.create()
  and audbackend.backend.*.delete()
  class methods
  to create or delete a repository
  on a backend
• Added: audbackend.backend.*.open()
  and audbackend.backend.*.close()
  methods
  to connect to a backend,
  or disconnect from a backend
• Added: audbackend.backend.Artifactory.get_authentication()
  to get the current Artifactory username, password
  from the configuration file/environment variable
• Added: authentication argument
  to audbackend.backend.Artifactory
  and audbackend.backend.Base
• Added: audbackend.backend.Artifactory.path()
  returning an artifactory.ArtifactoryPath object
• Added: audbackend.backend.Artifactory.authentication
  attribute,
  holding the current authentication object,
  e.g. user, password tuple
• Fixed: all backend methods now raise a ValueError,
  if a backend path ends on "/"
  with the exception of ls(),
  split()
  and join(),
  as those methods support sub-paths as argument
• Deprecated: audbackend.create(),
  use audbackend.backend.*.create() instead
• Deprecated: audbackend.delete(),
  use audbackend.backend.*.delete() instead
• Deprecated: audbackend.register(),
  as we no longer use alias names
  for backends
• Deprecated: audbackend.access(),
  instantiate and open a backend instead
• Deprecated: audbackend.Repository,
  as we no longer use alias names
  for backends
• Removed: audbackend.Artifactory
  and audbackend.FileSystem,
  use
  audbackend.backend.Artifactory
  and audbackend.backend.FileSystem
  instead
• Removed: audbackend.available()