Added nsqbeat (elastic#6957)

to support nsq.io as a message broker for input data

libbeat/docs/communitybeats.asciidoc

@@ -66,6 +66,7 @@ https://github.com/adibendahan/mysqlbeat[mysqlbeat]:: Run any query on MySQL and
 https://github.com/PhaedrusTheGreek/nagioscheckbeat[nagioscheckbeat]:: For Nagios checks and performance data.
 https://github.com/mrkschan/nginxbeat[nginxbeat]:: Reads status from Nginx.
 https://github.com/2Fast2BCn/nginxupstreambeat[nginxupstreambeat]:: Reads upstream status from nginx upstream module.
+https://github.com/mschneider82/nsqbeat[nsqbeat]:: Reads data from a NSQ topic.
 https://github.com/deepujain/nvidiagpubeat/[nvidiagpubeat]:: Uses nvidia-smi to grab metrics of NVIDIA GPUs.
 https://github.com/aristanetworks/openconfigbeat[openconfigbeat]:: Streams data from http://openconfig.net[OpenConfig]-enabled network devices
 https://github.com/joehillen/packagebeat[packagebeat]:: Collects information about system packages from package