Added README

plugins/inputs/fleet/README.md

@@ -0,0 +1,37 @@
+# Telegraf Input Plugin: Fleet
+
+The plugin will gather names of running units from [fleet](https://github.com/coreos/fleet) and the sum total of each running unit. It uses the fleet v1 API to gather data. 
+
+### Configuration:
+
+```toml
+# Description
+[[inputs.fleet]]
+## Works with Fleet HTTP API
+## Multiple Hosts from which to read Fleet stats:
+	hosts = ["http://localhost:49153/fleet/v1/state"]
+```
+
+### Measurements & Fields:
+
+The fields are dynamically generated from the output of the fleet API. Using the ```name``` value.. The values of those fields are the number of containers  with the ```systemdSubState``` value of "running".   
+<insert example json output here of both running and not to show what is included and not included>
+
+The unit names will have their instanced id and the @ symbol stripped off.  
+For example if you had a unit named ```nginx-1.10.1@35``` the field name would be ```nginx-1.10.1```. 
+
+- fleet
+    - ```<dynamic unit name>``` (int)
+
+### Tags:
+
+- All measurements have the following tags:
+    - server (name of the host/container telegraf is running on)
+
+### Example Output:
+
+```
+$ ./telegraf -config telegraf.conf -input-filter example -test
+* Plugin: fleet, Collection 1
+> fleet,host=localhost.local,server=http://fleet.testserver.com:49153/fleet/v1/state some-api=2i,test-application=1i,webapp=1i,nginx=2i,redis=1i 1470615664000000000
+```