renaming enableHighAccuracy

Hi,

The 'enableHighAccuracy' attribute continues to generate a lot of
controversy so I'd like to propose renaming it.

The main reason why it exists is to allow Web developers to say that
their application works fine with low-accuracy position fixes and,
therefore, the UA should not bother turning on location providers that
consume a lot of power. Web developers care about power consumption
since, on mobile devices especially, this has an impact on how long
their applications can be used. So how about renaming this attribute
to "lowPowerOnly" (thanks to Steve Block for the suggestion) ? This
name is closer to the intended effect: a hint that the implementation
should make use of only what it considers to be low power providers.
What is a low power provider is left to the implementation to decide,
but a reasonable course of action would be to avoid powering up the
GPS when "lowPowerOnly" attribute is set to true.

Thanks,
Andrei