Merge branch 'stable'
Bump to 1.1.3-SNAPSHOT
Update README.md
DefaultSerialization and SmallNumberSerialization no longer singletons
Add .context() and .graphContext() to Serialization
Make it possible to set a Header.Optional
WIP on versioning
Use hard-coded constants for the costs, for a 25% decrease in runtime.
Further micro-optimization
Nix the nextable array
Substantial improvement in inertial graph performance by using only one
short[]
Drop -SNAPSHOT for release
Merge branch 'release/1.1.3' into stable