0.2.0

[ivansglazunov]

• key field
• query schema config
• schema as way to create simple resolver support for hierarchical resolver generator #16
• stress tests
• more path data in flow
• less clones and cycles
• support for series, not parallel resolves #18
• support for variable links #17
• support for hash tables #14
• name method

[konard]

Thank you for a nice way to plan versions.