Analytics Widgets Interactivity/Improvements

[koensayr]

The widgets that appear on the analytics section of the site should be more interactive. Specifically I would focus on the top two widgets (Tweets and Followers).

• The Tweets and Followers Widget should default to say a 3 Month View
• The Tweets and Followers Widget should allow the user to select the interested timeframe
• The Docker Pulls and Docker Stars Widget lacks a ledgend
• The GitHub Issues Horizontal Axis isn't readable, perhaps narrow its focus to just a few project, remove entirely perhaps?

[jonasrosland]

I will look at the different views we can have and apply them to the data.

[jonasrosland]

Added a 2 months view for Tweets and Followers.
Remade the GitHub Issues into a piechart instead, more legible.

Having a timeframe choice will involve more work, so that will be delayed.
The legend for Docker Pulls and Stars will be fixed soon.

[jonasrosland]

Added a legend for the Docker stats in #26.