Use precompiled dependencies for Windows

Also cleaned up MagicFM and OpenAutomate remnants

.gitmodules

@@ -4,30 +4,15 @@
 [submodule "Externals/luabind"]
 	path = Externals/luabind
 	url = https://github.com/OpenXRay/luabind-deboostified.git
-[submodule "Externals/GameSpy"]
-	path = Externals/GameSpy
-	url = https://github.com/OpenXRay/GameSpy.git
 [submodule "Externals/AGS_SDK"]
 	path = Externals/AGS_SDK
 	url = https://github.com/GPUOpen-LibrariesAndSDKs/AGS_SDK.git
 [submodule "Externals/zlib"]
 	path = Externals/zlib
 	url = https://github.com/madler/zlib.git
-[submodule "Externals/libvorbis"]
-	path = Externals/libvorbis
-	url = https://github.com/xiph/vorbis.git
-[submodule "Externals/libogg"]
-	path = Externals/libogg
-	url = https://github.com/xiph/ogg.git
-[submodule "Externals/libtheora"]
-	path = Externals/libtheora
-	url = https://github.com/xiph/theora.git
 [submodule "Externals/BugTrap"]
 	path = Externals/BugTrap
 	url = https://github.com/OpenXRay/BugTrap.git
-[submodule "Externals/cryptopp"]
-	path = Externals/cryptopp
-	url = https://github.com/weidai11/cryptopp.git
 [submodule "Externals/gli"]
 	path = Externals/gli
 	url = https://github.com/g-truc/gli.git