Release v0.10.2 (take 4) (#1961)

* Release v0.10.2

Bump master to v0.10.3-pre

* update CHANGELOG

* add integrity hash to mhchem script in README

* tweaked CHANGELOG

website/versioned_docs/version-0.10.2/node.md

@@ -0,0 +1,79 @@
+---
+id: version-0.10.2-node
+title: Node.js
+original_id: node
+---
+## Installation
+### npm
+Install with `npm`:
+
+```bash
+npm install katex
+# or globally
+npm install -g katex
+```
+
+### Yarn
+Install with `Yarn`:
+
+```bash
+yarn add katex
+# or globally
+yarn global add katex
+```
+
+### Building from Source
+To build you will need Git, Node.js 8 or later, and Yarn.
+
+Clone a copy of the GitHub source repository:
+```bash
+git clone https://github.com/KaTeX/KaTeX.git
+cd KaTeX
+```
+
+Then install dependencies and run `build` script:
+```bash
+yarn
+yarn build
+```
+
+It will automatically transpile code and include only necessary fonts for
+target environments specified by [Browserslist config](https://github.com/browserslist/browserslist#environment-variables).
+For example, if you are making a web app for a kiosk with Chrome 68, run
+`BROWSERSLIST="Chrome 68" yarn build` and it will produce build with no
+transpilation, as it fully supports ES6, and only include WOFF2 fonts.
+
+You can override included fonts using environment variables. Set `USE_(FONT NAME)`
+environment variable to `"true"` or `"false"`, to force a font type to be included
+or excluded, respectively.`
+
+If you'd like to use the built KaTeX in other projects, install the package by
+specifying the path:
+```bash
+yarn add /path/to/KaTeX
+# or using npm
+npm install /path/to/KaTeX
+```
+
+> You can manually download the package and source code from
+[GitHub releases](https://github.com/KaTeX/KaTeX/releases).
+
+## Importing
+KaTeX is exported as a CommonJS module, which can be imported using `require`:
+```js
+const katex = require('katex');
+```
+
+If you're using a module loader, transpiler, or bundler that supports interoperability
+between ECMAScript module and CommonJS module, you can use `import`:
+```js
+import katex from 'katex';
+```
+
+KaTeX also provides an ECMAScript module:
+```js
+import katex from 'katex/dist/katex.mjs'
+```
+
+> The ES module contains ES6 syntaxes and features, and may need transpiling to
+use in old environments: