v0.2.0

4 changes:

• ability to efficiently skip types when decoding osmpbf #18
• the above also added protoscan for osmpbf decoding for a 10%ish performance improvement
• use cgo/czlib to decode protobufs (if cgo enabled), 20% faster on benchmarks #19
• deprecated node/ways/relations marshaling into this packages custom binary format. It could be improved and should be versioned separately. 8fcda5d