• [#303] Fully support PDFFile object.
• [#301] Add URI property to Artifact object.
• [#300] Support Object 'description' field.
• [#299] Add UnixUserAccount object.
• [#297] Fix error when PropertyTypes have 'delimiter' but no value.
• [#296] Allow setting 'condition' on Artifact object's RawArtifact propety.
• [#294] Support adding SSDEEP hashes.
• [#287] Don't include properties when adding Related Objects with inline=False.
• [#280] Handle 'event' property of Observables correctly.