Some major clean up

More flexible config setup, init-and-start script now waits for safeMode
off and checks for error codes along the way.

Also closes #4, as init-and-start.sh script now chmod 644 itself
Move to hadoop 1.2.1

closes #6
Not really checking ports, but using jps

to see what is running.  Stopping if it find hadoop, zookeeper or
accumulo

closes #7
Remove OX.AC.UK options

closes #5