Add antlr 3.4 build and install helper script

scripts/antlr34_install.sh

@@ -0,0 +1,44 @@
+#!/bin/sh
+
+WORKDIR=~/antlr34.tmp
+echo "This script will install antlr 3.4 (and matching libantlr) on your computer."
+read -p "Should the script create $WORKDIR and use it for building? [Y/n] " yn
+if [ "$yn" = "n" ]; then
+	exit
+fi
+mkdir -p $WORKDIR
+if [ ! -d $WORKDIR ]; then
+	echo "Error creating $WORKDIR"
+	exit
+fi
+cd $WORKDIR
+
+read -p "Should the script download and build antlr and libantlr3c? [Y/n] " yn
+if [ "$yn" = "n" ]; then
+	exit
+fi
+read -p "Should the script install with prefix /usr or /usr/local? [U/l] " yn
+if [ "$yn" = "l" ]; then
+	PREFIX=/usr/local
+else
+	PREFIX=/usr
+fi
+wget --no-check-certificate https://github.com/antlr/website-antlr3/raw/gh-pages/download/antlr-3.4-complete.jar
+wget --no-check-certificate https://github.com/antlr/website-antlr3/raw/gh-pages/download/C/libantlr3c-3.4.tar.gz
+tar xzf libantlr3c-3.4.tar.gz
+cd libantlr3c-3.4
+./configure --disable-abiflags --prefix=$PREFIX && make
+exit
+#&& sudo make install
+cd $WORKDIR
+
+sudo mkdir -p "$PREFIX/share/java"
+sudo mv antlr-3.4-complete.jar "$PREFIX/share/java"
+printf "#!/bin/sh
+export CLASSPATH
+CLASSPATH=\$CLASSPATH:$PREFIX/share/java/antlr-3.4-complete.jar:$PREFIX/share/java
+/usr/bin/java org.antlr.Tool \$*
+" > antlr3
+chmod a+x antlr3
+sudo mv antlr3 "$PREFIX/bin"
+