Similar Sites plugin

<b>What does your instant answer do?</b> Searches for similar sites.

<b>What problem does your instant answer solve?</b> It helps user to find similar pages like he uses and also provides their rating

<b>What is the data source for your instant answer?</b> It is https://developer.similarweb.com/

<b>Why did you choose this data source?</b> It is the best one which also supports rating.

<b>Are there any other alternative (better) data sources?</b> I think no.

<b>What are some example queries that trigger this instant answer?</b> "sites like facebook.com" "similar web to youtube.com"

<b>Which communities will this instant answer be especially useful for?</b> It would be for everyone who is looking for site alternatives. 

<b>Is this instant answer connected to a DuckDuckHack instant answer idea?</b> Yep, here it is https://duck.co/ideas/idea/1054/sites-like

<b>Which existing instant answers will this one supersede/overlap with?</b> I think there is not plugin like this one.

<b>Are you having any problems? Do you need our help with anything?</b> Yes, I want to add icon of pages into the item box. Is it possible?
![similarsites](https://cloud.githubusercontent.com/assets/865063/3233205/bc244048-f0bb-11e3-9d89-130a8c5061d5.png)

@Adman The trailing comma here will cause IE6 to fail. It's a bug in which you can't have a comma after the last element in an associative array.