Add basic chart widget to API user dashboard

[bajiat]

Using chart widget from task #78, add placeholder chart to API user dashboard.

Definition of done

• Insert chart template into API user dashboard template.
• Add any additional markup necessary.

[frenchbread]

Currently waiting for @elnzv to implement a sidebar for API user dashboard. So far I moved chart template to dashboard and removed routes and templates for posts. Here is the branch.

[frenchbread]

Since the data from elastic search is accessible, I am now trying to pass the data from the server-side (elasticSearch.js file) to template on client-side through the router (main.js). For that approach, @elnzv suggested to use reacrive-var package. Its functionality is very similar to Session. But the problem is that when I am assigning a variable inside ES.search method, it is not possible to read it outside the function, meaning that it comes as undefined. ElasticSearch package's documentation does not provide any additional info at this point.

@brylie, Any suggestions or possible solutions? This is actually javascript issue, nothing to do with meteor here. Global variables did not work as well as Sessions.
Here is working branch and last commit.