bronze and silver medal cloud
added legend + info

legend added, as was the dynamic info boxes.
added title + tooltip div.
styles for tooltip, text, title
removed the Event div
fixed targeting tooltip issue

removed event (due to noise) .. 
targeted only those with gold (error fixed).
Merge branch 'master' of github.com:BIGDIVE/BIGDIVE3-exercises

Conflicts:
	olympic_thinking/viewer.css
	olympic_thinking/viewer.js
	olympic_weight/olympic_stack.html