v0.5.2

Fix

• Backoff on indexer-service metrics HTTP error (45774c1)
• Subgraph query count delta timestamps (1dde139)

v0.5.1

Fix

• Hex_to_ipfs_hash (a9b326b)
• Dockerfile (6b30f62)

Documentation

• Link to CONTRIBUTING in README (a28568b)
• README badges (b48a1a4)
• Add CONTRIBUTING.md (cdc44cf)
• Remove stuff about agents/simulation (09f8f5d)