Add config to change all heatshields to RSS-class
Make launch sites snap to terrain

There are several ways to place ground objects.  The default places them
at a set height above sea level.  This changes them to be placed at
a set height above ground level.  This makes it much easier to change
the terrain around the launch sites.
Remove Earth-specific RSS files

Just replaces them with dummy files.  KSP doesn't load with zero-byte
configs present, for some reason.
Change default KSC location to snap to terrain
Remove trailing whitespace
New Kerbin terrain and edited heightmap

The heightmap was edited to increase the contrast between beaches and
mountains, at the expense of ocean depth.  The config lowers the maximum
height of mountains but greatly increases their cragginess, making them
look much larger and more impressive than before.

The coastline now mostly matches the old Kerbin coast.
Reposition KSC and island airfield

Move KSC to the edge of the cape to make it feel more like stock.  The
IslandAirfield is lowered to look slightly less ridiculous (it's still
on a slope, though, so it's still on a giant mound).
Rearrange Kerbin PQS config slightly

More important stuff near the top.
Slight atmosphere shader tweak

I'm not sure this really did much.  The intent was to reduce the
atmoshere glow during ascent.
Reposition other launch sites

Mostly lower them to match the new terrain.  Unfortunately there aren't
any more high-altitude launch sites after this change.
Reduce maximum time acceleration

The RSS changes to time acceleration are a bit overkill on 6.4x Kerbin.