bump elasticsearch to 0.90.0
fixed the build process to copy the jar as logstash.jar and the redhat script to work with the correct LS_HOME location which is /opt/logstash
fixed centos init script to use /var/run/logstash/ for lock file
another change to build.sh for centos
another fix :)
Merge pull request #483 from Scene53/1.1.x

1.1.x