message: chore(logo): minor corrections.
diff: -<img src="doc/asset/Rx_Logo_S.png" alt="Miss Electric Eel 2017" width="86" height="86"> RxJs: ReactiveX for JavaScript
  +<img src="doc/asset/Rx_Logo_S.png" alt="RxJS Logo" width="86" height="86"> RxJS: Reactive Extensions For JavaScript
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