more stuff added to documentation

docs/documentation.rst

@@ -104,7 +104,7 @@ the system up if necessary (see `Scaling`_).
 Integration With Syslog
 ~~~~~~~~~~~~~~~~~~~~~~~
 
-The lens2 daemon is meant to be connected to a syslog server, usually
+The lens daemon is meant to be connected to a syslog server, usually
 a 'collector' for your remote logs, via a FIFO.
 
 Lens supports a number of syslog-like formats for its input:
@@ -143,6 +143,19 @@ daemon. Furthermore, the indexer daemon will block reading from the
 FIFO whenever the ES backend is unavailable.
 
 
+
+Integration With Elasticsearch
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+Some maintenance tasks on the Elasticsearch cluster will be
+required. For instance, Lens periodically removes old logs from the
+index; unless the Elasticsearch index is optimized once in a while, it
+will grow unbounded.
+
+
+
+
 Web Application Deployment
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -218,6 +231,13 @@ can reliably insert upwards of 2500 logs/sec.
 
 
 
+Links
+-----
+
+A project that is very similar to Lens, but bigger and better, is
+Logstash_.
+
+
 
 
 .. _Elasticsearch: http://www.elasticsearch.org/
@@ -226,3 +246,4 @@ can reliably insert upwards of 2500 logs/sec.
 .. _Flask: http://flask.pocoo.org/
 .. _Flask deployment documentation: http://flask.pocoo.org/docs/deploying/
 .. _flup: http://pypi.python.org/pypi/flup
+.. _Logstash: http://www.logstash.net/