added new RA multiplayer (desert) map: Pluto

Added Pluto,  a new RA multiplayer map that focuses on Naval engagements
and oil derrick control.
Add Nukem's maps to the csproj
Add license notice to FortScript.cs
Add some debugging information to LoadYamlRules
Unbreak Fort Lonestar
Rename FortScript.cs to match the name of the map it's for
added the parabox animation when parabomb cates are collected
fixed Mig bombers crashing to earth when entering Fort Lonestar
make the snipers fire at targets in Fort Lonestar
fixed conflicting sniper hotkey and too much damage vs walls

closes #3381
Merge pull request #3403 from wuschel/bleed

added new RA multiplayer (desert) map: Pluto
added a Dune 2000 SOUND.RS parser

again @pchote via IRC
implement the fact chunk for WAVE files
replaced Dune 2000 AUD with original WAV

removed *.aud hard-coding everywhere
Add Stream.ReadASCIIZ for d2k.
Fixup: Use ReadASCIIZ in D2kSoundResources.
Ignore unknown wav chunks instead of throwing.
Merge pull request #3415 from pchote/remove-dead-external-connect

Remove Bitrotted JoinExternalGame.
Don't reserve airfields/helipads for husks that just fall down

fixes #3376
added Imperial Basin

http://content.open-ra.org/index.php?p=detail&table=maps&id=1028