Update How_to_run_script.md
Update How_to_run_script.md
Update How_to_run_script.md
Update How_to_run_script.md
Merge pull request #8 from MariosLogothetis/master

Update "How_to_run_script.md"
Create cluster script that installs hadoop and starts it. No loggings
Merge remote-tracking branch 'upstream/master'