[whatwg] Consider changing the default volume for and to be 1.0 instead of 0.5

[Adele Peterson]

Hi all,

The spec currently says that the default volume level is 0.5.  In  
WebKit's initial implementation, we have received feedback that the  
audio seems much too soft.  If a user has already adjusted their  
device's volume to their liking, then I think 1.0 should correspond to  
that level, and that should be the default.  This will enable the  
browser to have similar volume levels to other applications on the  
system, and will respect the system volume.

Thanks,
        Adele