Brent Vatne 0b844feedb [TouchableOpacity] Reset opacity to the inactiveValue rather than always 1.0 ...

Summary:
As per #941 - fixes bug with `TouchabeOpacity` always reseting child opacity to `1.0` after press.

A note about the code: we could probably use a general `getNativeProp(propName, callback)` function rather than `getOpacity` but just used that as it was simpler for this specific PR, perhaps that refactor could be left to another - or maybe there is a way to do this already that I missed.

Before:
![bug](https://cloud.githubusercontent.com/assets/90494/7287207/52d6a686-e907-11e4-8e16-04b2ddd0582c.gif)

After:
![after](https://cloud.githubusercontent.com/assets/90494/7287689/5aca4776-e90c-11e4-8c40-aa6bd3e822d8.gif)

Example code:
```javascript
'use strict';

var React = require('react-native');
var {
  AppRegistry,
  StyleSheet,
  Text,
  View,
  TouchableOpacity,
} = React;

var TestIt = React.createClass({
  render() {
    return (
      <View style={styles.container}>
        <TouchableOpacity activeOpacity={0.3}>
          <View style={styles.searchButton}>
            <Text>
Closes https://github.com/facebook/react-native/pull/977
Github Author: Brent Vatne <brent.vatne@madriska.com>

Test Plan: Imported from GitHub, without a `Test Plan:` line.

2015-05-06 17:27:12 -08:00

..

ensureComponentIsNative.js

flowified Libraries from Avik

2015-03-25 12:44:28 -08:00

TouchableBounce.js

[react-native] Don't mutate props in TouchableBounce

2015-05-02 10:23:24 -08:00

TouchableHighlight.js

Fixing TouchableOpacity and TouchableHighlight documentation

2015-03-28 15:18:31 -08:00

TouchableOpacity.js

[TouchableOpacity] Reset opacity to the inactiveValue rather than always 1.0

2015-05-06 17:27:12 -08:00

TouchableWithoutFeedback.js

[ReactNative] Revert D1965911

2015-04-06 08:45:46 -08:00