Add README

Author: kgryte

lib/node_modules/@stdlib/plot/components/svg/defs/README.md

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+# Definitions
+
+> [SVG][svg] plot definitions.
+
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- Package usage documentation. -->
+
+<section class="usage">
+
+## Usage
+
+``` javascript
+var Defs = require( '@stdlib/plot/components/svg/defs' );
+```
+
+#### Defs()
+
+Returns a `Defs` instance.
+
+``` javascript
+var node = new Defs();
+// returns <Defs>
+```
+
+---
+
+### Methods
+
+<a name="method-render"></a>
+
+#### Defs.prototype.render()
+
+Renders an instance as a [virtual DOM tree][virtual-dom].
+
+``` javascript
+var node = new Defs();
+
+var vtree = node.render();
+/* e.g., returns
+    {
+        'tagName': 'defs',
+        'properties': {
+            'namespace': void 0
+        },
+        'children': [],
+        'namespace': 'http://www.w3.org/2000/svg',
+        'count': 0,
+        'hasWidgets': false,
+        'hasThunks': false,
+        'descendantHooks': false,
+        'hooks': void 0,
+        'key': void 0
+    }
+*/
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- Package usage examples. -->
+
+---
+
+<section class="examples">
+
+## Examples
+
+``` javascript
+var toHTML = require( 'vdom-to-html' );
+var defs = require( '@stdlib/plot/components/svg/defs' );
+
+// Create a new component:
+var node = defs();
+
+// Render as a virtual DOM tree:
+var vtree = node.render();
+
+// Transform the virtual DOM tree to HTML:
+var html = toHTML( vtree );
+// returns <defs></defs>
+```
+
+</section>
+
+<!-- /.examples -->
+
+<!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="references">
+
+</section>
+
+<!-- /.references -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+[svg]: https://www.w3.org/Graphics/SVG/
+[virtual-dom]: https://github.com/Matt-Esch/virtual-dom
+
+</section>
+
+<!-- /.links -->