Add readme.md

README.md

+ `<reviews-table>` is a web component designed to visualize reviews and visualize each review rating.
+This web component obtains data from Tourpedia API.
+
+### Usage
+
+This web component accepts the following parameters:
+
+```html
+
+<reviews-table 
+    query="{{query}}"
+    ids=["<!-- array with tourpedia places ids to obtain reviews about -->"]
+    icon='social:people'>
+</reviews-table>
+
+```
+
+### Installation
+
+This web component is available in bower. 
+
+```bash
+
+$ bower install reviews-table
+
+```
+
+This command will install it inside `bower_components` folder
+
+Remember to edit your `elements.html` with this component.