Add the mapreduce configurations file.
Add start.sh for starting the cluster.

On this machine, the .bashrc file contains the following:
export JAVA_HOME=/usr/lib/jvm/java-1.6.0/

export HADOOP_INSTALL=/home/shayan/hadoop
export PATH=$PATH:$HADOOP_INSTALL/bin
export PATH=$PATH:$HADOOP_INSTALL/sbin
export HADOOP_MAPRED_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_HOME=$HADOOP_INSTALL
export HADOOP_CONF_DIR=$HADOOP_INSTALL/etc/hadoop
export HADOOP_HOME=$HADOOP_INSTALL
export HADOOP_HDFS_HOME=$HADOOP_INSTALL
export YARN_HOME=$HADOOP_INSTALL

We cannot use the start-dfs and start-yarn commands yet (maybe because we
haven't specified the slave nodes).