Adds some additional documentation
Merge branch 'master' of https://github.com/samuelcarlt0n/tourguide

* 'master' of https://github.com/samuelcarlt0n/tourguide:
  Adds viewport tag to the demo index file for making devices happy.
  Adds some fine tuning to the example tour and how plaques open.

Conflicts:
	src/plaque.js