0.2.0

• Binary database format has changed
• Metadata is stored for all objects except for untagged nodes
• Untagged nodes have only version number metadata, which is stored in the locations table
• LMDB version locked to 0.9.22 to match current version of lmdb python package. With mismatched versions, C++ and python cannot access the database concurrently.
• Python example programs are in the Git repository and not part of the binary release.