Add config to use RSS settings for heatshields

Remove incomplete custom heatshield config.
Remove default RSS settings intended for Sol

"Empty" files to replace the asteroids and atmosphere gas settings from
RSS.  They have dummy modulemanager entries in them because KSP freaks
out when it runs into 0-byte configs.
Reduce RSS time acceleration

The time acceleration tweaks made by RSS were a bit overkill for 6.4x
Kerbin.  This scales them back a bit.
Merge pull request #2 from NonWonderDog/whitespaceFixes

Remove trailing whitespace
Merge pull request #3 from NonWonderDog/RSSHeatshields

Add config to use Realism Overhaul settings for heatshields
Merge pull request #4 from NonWonderDog/TimeAccelTweaks

Reduce RSS time acceleration
Merge pull request #5 from NonWonderDog/EarthFilesOverride

Remove default RSS settings intended for Sol
Add new terrain based on edited heightmap

The new heightmap increases the contrast between beaches and mountains,
at the expense of mountain height.  It still needs some heightmap tweaks
to add cliffs and fjords back to Kerbin, as currently it has sandy
beaches everwhere.

The config reduces the height of Kerbin's peaks down closer to stock,
but greatly increases the cragginess of mountains and the frequency of
hills and lakes.  The mountains end up looking bigger and more
impressive as a result regardless of their diminished stature.
Rearrange PQS terrain sections

Easier to scan this way, with more basic parts on top.
Reposition launch sites

KSC is moved to the edge of the Cape to get more of that stock feeling.

All launch sites are snapped to terrain and lowered to match the new
terrain altitudes.  Unfortunately there aren't any more high-altitude
launch sites after this change.
Reposition Island Airfield

This slightly lowers the island airfield to make it look slightly less
ridiculous.  It's still on a slope, though, so to be level it still sits
on a huge berm.
Tweak Kerbin atmosphere shader

The intent is to reduce the oversized atmosphere shader effect during
ascent and in low orbit.  I used probably (?) realistic numbers, but it
didn't seem to do very much.