refactoring reporting + configstore option

https://github.com/fluents/bench-chain/blob/0578e098d492c47c416f27460f63080f78061488/docs/CHANGELOG.md#041

v0.2, async helping, avg reporting

⏱ microtime, ⛓ chainable, 📊 more graphs, 🖥 flags

- ⏱ microtime in recordings
- ⛓ extend chainable
- 📊 format microtime recordings
- 👾 simplify async benchmarks
- 📈📉 more nice graphs
- 🖥 cli args for handling how many times to run benchmarks and showing graph with --graph flag

version 0.1, initial

📦⬇ deps, 📖📘 readme, 💚 travis, ⛓📛 badges

- 📦⬇ tweak deps
- 📖📘 more docs
- 💚 travis file
- ⛓📛 fluent badge