Bug#439725: some packaging info

[Mark Whitis]

You may be able to install both antlr v3 and antlrworks by installing
one jar file, plus 2 wrapper scripts in /usr/bin/, plus docfiles, plus
any language specific support stuff, antlrworks includes antlr and you
can run antlr from the included jar.

wget http://www.antlr.org/download/antlrworks-1.1.5.jar
wget http://www.freelabs.com/~whitis/java/example_wrapper_script

java -cp /usr/local/src/antlrworks/antlrworks-1.1.5.jar org.antlr.Tool
[args]  
java -jar /usr/local/src/antlrworks/antlrworks-1.1.5.jar [args]

also, eliminate the confusion between antlr and cantlr packages.  antlr
seems to be an ancient version.

antlr v3.01 supports C code generation which probably makes pccts less
important (but still keep around for compiling packages where the
distributor inconsiderately "cleans" generated grammar files).