v0.1.1

Added

• give each feature file a working directory
• (plugin) per_worker instances, one per feature file
• (plugin) load at startup, drop after the pool drains
• (runner) dispatch plugin steps off the executor
• (plugin) plugin steps, selected per scenario
• (plugin) eager config validation, lazy instances
• (config) opaque resource groups served by plugins
• (plugin) load a cdylib over a JSON ABI

Other

• the plugin contract, and a plugin written against it
• (plugin) end-to-end acceptance for the plugin layer
• run the examples against a local Smocker mock server