Added XHR calls to oald website.
Parsed the response for word definitions.
Logging it to the console.
- Added XHR calls to oald page to fetch word definitions.
- Only first 3 definitions of a word will be displayed along with pronunciation.
- Definitions are shown at the bottom of the page in a 'fixed' div.
- User can still click on the link in this div to visit oald page.

renamed:    oald.ico -> img/oald.ico
changed background to white
Changed the style of definition display and removed old links