bugfix: cachepipe was not in perl path
bugfix: setting joshua
bugfix: stray / in thrax path file for rolled-out hadoop cluster
bugfix: unset HADOOP_CONF_DIR when rolling out own cluster
added option to set amount of mem used by the packer
lowered the default memory for the packer to 4g, pipeline still uses 16g
lowered the packer default slice size, reduced the default memory 16g --> 2g),
and made the memory amount an argument (--packer-mem)
Now exits with an error code if the packing failed. Also fixed a bug where it wasn't
heeding the command-line arguments.
add run-bundler script