Creates TrafficStatus sample app

And sets up background fetch. Adds an image to demo the capabilities.
Creates basic tableview example with traffic status

We start with 4 random reports. Refreshing the table view causes extra
entries to be generated. Ready for the background fetch process to be
included now...
Adds facility to support background fetch

It's very simple really. Wonderful.
Completes article writeup for background fetch

Also fixes a couple of issues with the code.
Adds license text to source files
Merge branch 'days/03-multitasking'