Add Pressible component

Ref GH-2

packages/simple-actions/hz-pressible/package.json

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+{
+  "name": "hz-pressible",
+  "version": "0.0.1",
+  "description": "A pressible component",
+  "main": "index.js",
+  "license": "MIT"
+}

packages/simple-actions/hz-pressible/readme.md

@@ -0,0 +1,19 @@
+A component that manages a pressed state for the children.
+
+```js
+
+const myPressible = ({pressed, setPress}) =>
+    <div
+        onMouseDown={() => setPress(true)}
+        onMouseUp={() => setPress(false)}
+        style={{
+            backgroundColor: pressed ? 'pink' : 'gray',
+            padding: 10,
+            display: 'inline-block',
+        }}
+    >
+        Press Me
+    </div>;
+
+<Pressible render={myPressible} />
+```

packages/simple-actions/hz-pressible/src/index.js

@@ -0,0 +1,63 @@
+// @flow
+import {Component} from 'react';
+
+// eslint-disable-next-line no-duplicate-imports
+import type {Element} from 'react';
+
+type RenderProps = {};
+
+type Props = {
+  /**
+   * Something something
+   * @param  {[type]} props [description]
+   * @return {[type]}       [description]
+   */
+  render: (props: RenderProps) => Element<*>,
+  /**
+   * [value description]
+   * @type {[type]}
+   */
+  onPress?: (value: boolean) => void,
+};
+
+type State = {
+  pressed: boolean,
+};
+
+const intialState = {
+  pressed: false,
+};
+
+/**
+ *  This is a basic pressible component
+ *  @returns Component
+ */
+class Pressible extends Component<Props, State> {
+  state = {...intialState};
+
+  componentDidUpdate(prevProps: Props, prevState: State) {
+    if (
+      typeof this.props.onPress === 'function' &&
+      prevState.pressed !== this.state.pressed
+    ) {
+      this.props.onPress(this.state.pressed);
+    }
+  }
+
+  handlePress = (pressed: boolean) => {
+    this.setState((state: State): ?State => {
+      if (pressed === state.pressed) return null;
+      return {...state, pressed};
+    });
+  };
+
+  render() {
+    return this.props.render({
+      ...this.props,
+      ...this.state,
+      setPress: this.handlePress,
+    });
+  }
+}
+
+export default Pressible;