Add mapping example - just proof of concept

We were playing with a couple of ideas in displaying the mapping in real
time. I have successfully used google maps to automatically update the
marker as time passes, proving we can use it for our mapping
visualization.
Add plot path ability in Mapping example

Can now plot a path as the marker is being updated. Can potentially also
plot mulitple paths.
Minor edit in Mapping example
Merge pull request #5 from chutsu/master

Mapping Example