Updated README with better build documentation.
Added logstash contrib plugins.
Cleaned up Vagrantfile.
Fail fast and enable debugging via an env var.
Added env var for linked elasticsearch container.
Bump version to 0.6.0
Merge pull request #7 from pblittle/feature/cleanup-cleanup

Feature/cleanup cleanup
Whitespace fix.
Merge branch 'release/0.6.0'