add snippet to comments. handle case where the onload event has ALREADY fired.
replace tabs with 4 chars. add bResourceTimingAgg.
use script async defer to load snippet
remove some stubs
Improve snippet pattern. Increment version to 0.3. Define EPISODES.setDefault(). Add options: bSendBeacon, bResourceTimingAgg. Add Resource Timing metrics. Check if onload has already fired. Right now only beacon back aggregate Resource Timing stats and slowest resource.