feat(InfiniteStoryBase): a new property disableSetUrl, when set to true will not execute setUrl

[chchitti]

The context is for some publishers, in the story pages after the story we are showing a set of story snapshots created using stories fetched from InfiniteStoryPage component. The InfiniteStoryPage Component will set the url to the next story when the next story comes into focus. When the snapshot loads, the url is changed to the next story url by the InfiniteStoryPage component and we want to make this tog gable.

Example:
<InfiniteStoryBase
render={this.getStoryTemplate()}
loadItems={this.storyPageLoadItems}
onInitialItemFocus={item => this.onInitialItemFocusHandler(item)}
onItemFocus={() =>{}}
doNotChangeUrl={true} />
This will disable updating of url and title of the page when the next story loads

[Jeevan-Kishore]

What is this for? What does it do?

[gja]

Please add documentation and an example.

[gja]

@chchitti please update the README.md explaining how to use your new options