created a build without react included

Built with the following command:
```sh
$ browserify -s ReactTypeahead -o dist/react-typeahead-no-react.js -i "react" -x "react" -x "react/addons" -r "react" src/react-typeahead.js
```
Updated examples

To use with requirejs you must use the react-with-addons version, a shim config and a map config option.

```js
shim: {
    'react-typeahead': {
        deps: ['react/addons']
    }
},
map: {
    '*': {
        'react/addons': 'react'
    }
}
```