extending README
name resolution issues, added dnsmasq and sshd
added spark-env.sh to solve some configuration problems
getting rid of duplication configs in shark-env.sh versus spark-env.sh
bringing README up-to-date
extending README
Merge pull request #2 from AndreSchumacher/master

Solving issues with more than 1 worker node, new JDK, sshd and dnsmasq