Dash-cytoscape

Added
* Homepage URL for PyPi
* Long Description for PyPi

Changed
* Cytoscape component docstring for thorough and well-formatted references (26)
* Refactored code base to match the up-to-date version of `dash-component-boilerplate` (27)

Fixed
* Console error where `setProps` gets called even when it is undefined ( 28)
* Incorrect setProps assignment that causes `setProps` to not be properly defined when nested in bigger apps (e.g. `dash-docs`) (28)

Added
* Detailed usage example for rendering Biopython's Phylo object (phylogeny trees) into a Cytoscape graph, with interactive features such as highlighting.
Updated
* Cytoscape.js version, from 1.0.1 to 1.1.0

Added
* Author email and improve description
* Data section of demos readme
* Added the components "dash", "dash-html-components", and "dash-renderer" as explicit package requirements.

Changed
* Move grid layout data file
* Change App.js react demo data to be local
* Installation steps in readme to use yarn


Updated
* Cytoscape.js version, correct component import

Fixed
* Correct unpkg link error
* Markdown formatting for CONTRIBUTING.md

Break and fix 👷