Do not reload the disqus component unless the identifier changes

[brucethwaits]

Do not reload the disqus component on componentDidUpdate() unless the identifier changes.
Without this change, any change in page store data can trigger a reload of the disqus component.

This change works on my machine when using the script as part of another solution. However, when I try build as part of the forked repo, I get this error on npm install :
No compatible version found: react@'>=0.14.0 <0.15.0'

[brucethwaits]

The change works - I just wasn't able to run your dist build to create the dist files (including minified js)

[thangngoc89]

I think this logic should be in shouldComponentUpdate

This way, no need for state. Just compare current props and nextProps

[mzabriskie]

Agreed with @thangngoc89, let's move the logic to shouldComponentUpdate.