Changed default for StaticWebCache to include low bandwith net service
sequencer. This reduces last-mile network contention by staggering the
start of concurrent net operations. It automatically disables that at 3G
and higher speeds measured of the previous 10 (rolling average) requests.

Each get may be staggered in a potential choke situation by up to 5sec or
the recent averge response time from request to HTTP header received,
whichever is less. The response is not delayed if broadband is available
or no concurrent net requests are in flight.
Merge branch 'master' of github.com:TantalumMobile/Tantalum