Update README.md

Author: rerpha

README.md

@@ -4,11 +4,19 @@ Serialise/deserialise flatbuffers blobs from kafka.
 This currently deserialises https://github.com/ess-dmsc/python-streaming-data-types, but I am working to make it agnostic. Python bindings for the respective schema will need to be generated. 
 
 # Usage
-`saluki --help`
+See `saluki --help` for all options. 
 
-# install 
+## Listen to a topic for updates
+`saluki listen mybroker:9092/mytopic` - This will listen for updates for `mytopic` on `mybroker`. 
+
+## Consume from a topic
+`saluki consume mybroker:9092/mytopic -p 1 -o 123456 -m 10` - This will print 9 messages before (and inclusively the offset specified) offset `123456` of `mytopic` on `mybroker`, in partition 1.
+
+Use the `-g` flag to go the other way, ie. in the above example to consume 9 messages FROM offset 123456
+
+# Install 
 `pip install saluki`
 
-## developer setup 
+## Developer setup 
 `pip install .[dev]`