Update README.md

README.md

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 # google-image-search
 You're able to query google for images using Google's new Custom Search API.
+
+``` php
+ImageSearch::config()->apiKey('API Goes Here');
+ImageSearch::config()->cx('CX Goes Here');
+
+ImageSearch::search('civic'); // returns array of results
+```
+
+## Installation
+Use composer to install
+
+`composer require odannyc/google-image-search`
+
+## Usage
+Set your API and CX string using the config method:
+
+```php
+ImageSearch::config()->apiKey('API Goes Here');
+ImageSearch::config()->cx('CX Goes Here');
+```
+
+Once that's done, use the search method to query a specific string of text
+
+```php
+ImageSearch::search('civic');
+```
+
+It'll return an array of results. The images are specifically in the `items` key.