Update astyle to 2.05.1, add astyle Linux binaries

Unfortunately, different versions of astyle produce slighty different
formatting, so it's important that everyone uses the same version.

Thus it makes sense to provide astyle binaries for Win32 and
Linux x86 and x86_64 (to prevent usage of outdated versions from package
managers etc)

Most probably it would be easy to add an OSX astyle binary as well and
call that from astyle-code.sh if applicable.
I don't have a Mac, though, so someone else will have to do it ;-)

neo/astyle-code.sh

@@ -1,8 +1,39 @@
 #!/bin/sh
 
-# TODO make sure that the astyle version is >= 2.03 or quit
+# keep the following in sync with our supplied astyle binaries!
+OUR_ASTYLE_VERSION="2.05.1"
 
-astyle -v --formatted --options=astyle-options.ini --exclude="libs" --recursive *.h
-astyle -v --formatted --options=astyle-options.ini --exclude="libs" --exclude="d3xp/gamesys/SysCvar.cpp" --exclude="d3xp/gamesys/Callbacks.cpp" --exclude="sys/win32/win_cpu.cpp" --exclude="sys/win32/win_main.cpp" --recursive *.cpp
+print_usage () {
+	echo "By default, this script only works on Linux i686 or amd64 (with our supplied astyle binaries)"
+	echo "You can use your own astyle binary by setting the ASTYLE_BIN environment variable before calling this script"
+	echo "  e.g.: ASTYLE_BIN=/usr/bin/astyle $0"
+	echo "But please make sure it's version $OUR_ASTYLE_VERSION because other versions may format differently!"
+}
 
-#pause
+if [ -z "$ASTYLE_BIN" ]; then
+
+	if [ `uname -s` != "Linux" ]; then
+		print_usage
+		exit 1
+	fi
+
+	case "`uname -m`" in
+		i?86 | x86 ) ASTYLE_SUFFIX="x86" ;;
+		amd64 | x86_64 ) ASTYLE_SUFFIX="x86_64" ;;
+		* ) print_usage ; exit 1  ;;
+	esac
+
+	ASTYLE_BIN="./astyle.$ASTYLE_SUFFIX"
+fi
+
+ASTYLE_VERSION=$($ASTYLE_BIN --version | grep -o -e "[[:digit:]\.]*")
+
+if [ "$ASTYLE_VERSION" != "$OUR_ASTYLE_VERSION" ]; then
+	echo "ERROR: $ASTYLE_BIN has version $ASTYLE_VERSION, but we want $OUR_ASTYLE_VERSION"
+	echo "       (Unfortunately, different versions of astyle produce slightly different formatting.)"
+	exit 1
+fi
+
+$ASTYLE_BIN -v --formatted --options=astyle-options.ini --exclude="libs" --recursive "*.h"
+$ASTYLE_BIN -v --formatted --options=astyle-options.ini --exclude="libs" --exclude="d3xp/gamesys/SysCvar.cpp" --exclude="d3xp/gamesys/Callbacks.cpp" \
+		--exclude="sys/win32/win_cpu.cpp" --exclude="sys/win32/win_main.cpp" --recursive "*.cpp"