predefined config files for multiple kafka servers
improved README
Merge pull request #25 from HernanRivasAcosta/hernan.improved_documentation

improved README
Fixed a few grammatical errors

And a link.
Merge branch 'master' of https://github.com/HernanRivasAcosta/kafkerl
added dump files to the ignore list, changed the way kafka brokers are killed
added version number to kafkerl