Closes #1 - Set up project with initial scripts and configuration

I was trying to run these scripts on my system.  I have hadoop 2.3.0 installed locally and I was trying to use hadoop 2.6.0 w/ these scripts.   start-dfs.sh kept picking up my hadoop 2.3.0 install.  I tracked down the problem.  fluo-dev calls reset-hadoop.sh, calls start-dfs.sh, calls hadoop-daemons.sh, calls slaves.sh, calls hadoop-daemon.sh.

The problem is that slaves.sh ssh's to localhost.  This loses the HADOOP_PREFIX that was set to 2.6.0.  In my bashrc HADOOP_PREFIX is set to 2.3.0.  So when slaves.sh uses ssh to call hadoop-daemon.sh HADOOP_PREFIX is 2.3.0 instead of 2.6.0.

Maybe before sourcing env.sh, we could check if HADOOP_PREFIX is set and bail.