Update build.xml for creating a fat jar that includes all external dependencies

[mohammedguller]

The project uses a bunch of other external libraries, but those dependencies are not specified in the build.xml file. It would be great if you could update the build file so that a fat jar that includes all external dependencies can be built using ANT or maven.

[mohammedguller]

Never mind. Reading through the source code, I realized that it picks up all the external dependencies from C* lib directories. The reason it didn't initially work on my setup is that the scripts in the bin directory look for cassandra.in.sh file in specific directories and our default C* path didn't match any of those, so the CLASSPATH environment variable was not getting set correctly.