0.4.1

• Fix a bug with the deletion of a Concept not being possible without having
  it's matches deleted first. (#10) [BartSaelen]

0.4.0

• Major BC break: A provider is no longer passed a database session, but a
  database session maker. This change was needed to get the provider to function
  properly in threaded web applications. This will mean changing the
  code where you're creating your provider. In the past, you probably called
  a session maker first and then passed the result of this call to the provider.
  Now you should just pass the session maker itself and let the provider create
  the sessions for you.
• Different way of fetching the skosprovider.skos.ConceptScheme
  for a provider. No longer fetches a conceptscheme at provider instantiation,
  but when needed. Otherwise we end up with a possibly very long cached version
  of a conceptscheme.

0.3.0

• Update to skosprovider 0.4.0.
• Add :skosprovider.skos.ConceptScheme information to a provider so it
  can be attached to skosprovider.skos.Concept objects that are
  handled by the provider.
• Let provider handle superordinates and subordinate arrays.
• Let provider add notes to collections.
• Added a skosprovider_sqlalchemy.models.Match model to handle
  matches. Expand the provider to actually provide information on these matches.
• Expand the field length for language identifiers. IANA suggests that
  identifiers up to 35 characters should be permitted. Updated our field length
  to 64 to have a bit of an extra buffer.

0.2.1

• Switch to py.test
• Add Coveralls support for code coverage.
• Add ability to configure the SQLAlchemy URL used for testing. Allows testing
  on multiple RDBMS systems.
• Run Travis tests for both SQLite and Postgresql.
• Fix a bug in skosprovider_sqlalchemy.utils.import_provider when
  dealing with narrower collections (#8). [cahytinne]
• Make the provider actually generate a URI if there's none in the
  database.

0.2.0

• Compatibility with skosprovider 0.3.0
• Implement skosprovider.providers.VocabularyProvider.get_by_uri.
• Implement skosprovider.providers.VocabularyProvider.get_top_concepts.
• Implement skosprovider.providers.VocabularyProvider.get_top_display
  and skosprovider.providers.VocabularyProvider.get_children_display.
• Add a UniqueConstraint(conceptscheme_id, concept_id) to Thing. (#3)
• Rename the collections attribute of skosprovider_sqlalchemy.models.Thing
  to member_of. (#7)