Add link to CodeStyle wiki page in plugin guides

docs/AGGREGATORS.md

@@ -17,6 +17,7 @@ This section is for developers who want to create a new aggregator plugin.
   through it. This should be done using the builtin `HashID()` function of
   each metric.
 * When the `Reset()` function is called, all caches should be cleared.
+- Follow the recommended [CodeStyle][].
 
 ### Aggregator Plugin Example
 
@@ -124,3 +125,4 @@ func init() {
 
 [telegraf.Aggregator]: https://godoc.org/github.com/influxdata/telegraf#Aggregator
 [SampleConfig]: https://github.com/influxdata/telegraf/wiki/SampleConfig
+[CodeStyle]: https://github.com/influxdata/telegraf/wiki/CodeStyle

docs/INPUTS.md

@@ -20,6 +20,7 @@ and submit new inputs.
   consult the [SampleConfig][] page for the latest style
   guidelines.
 - The `Description` function should say in one line what this plugin does.
+- Follow the recommended [CodeStyle][].
 
 Let's say you've written a plugin that emits metrics about processes on the
 current host.
@@ -137,6 +138,7 @@ Check the [amqp_consumer][] for an example implementation.
 [prom metric types]: https://prometheus.io/docs/concepts/metric_types/
 [input data formats]: https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
 [SampleConfig]: https://github.com/influxdata/telegraf/wiki/SampleConfig
+[CodeStyle]: https://github.com/influxdata/telegraf/wiki/CodeStyle
 [telegraf.Input]: https://godoc.org/github.com/influxdata/telegraf#Input
 [telegraf.ServiceInput]: https://godoc.org/github.com/influxdata/telegraf#ServiceInput
 [telegraf.Accumulator]: https://godoc.org/github.com/influxdata/telegraf#Accumulator

docs/OUTPUTS.md

@@ -15,6 +15,7 @@ similar constructs.
   plugin can be configured. This is included in `telegraf config`.  Please
   consult the [SampleConfig][] page for the latest style guidelines.
 - The `Description` function should say in one line what this output does.
+- Follow the recommended [CodeStyle][].
 
 ### Output Plugin Example
 
@@ -92,4 +93,5 @@ You should also add the following to your `SampleConfig()`:
 [file]: https://github.com/influxdata/telegraf/tree/master/plugins/inputs/file
 [output data formats]: https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
 [SampleConfig]: https://github.com/influxdata/telegraf/wiki/SampleConfig
+[CodeStyle]: https://github.com/influxdata/telegraf/wiki/CodeStyle
 [telegraf.Output]: https://godoc.org/github.com/influxdata/telegraf#Output

docs/PROCESSORS.md

@@ -16,6 +16,7 @@ This section is for developers who want to create a new processor plugin.
   plugin can be configured. This is included in `telegraf config`.  Please
   consult the [SampleConfig][] page for the latest style guidelines.
 * The `Description` function should say in one line what this processor does.
+- Follow the recommended [CodeStyle][].
 
 ### Processor Plugin Example
 
@@ -60,4 +61,5 @@ func init() {
 ```
 
 [SampleConfig]: https://github.com/influxdata/telegraf/wiki/SampleConfig
+[CodeStyle]: https://github.com/influxdata/telegraf/wiki/CodeStyle
 [telegraf.Processor]: https://godoc.org/github.com/influxdata/telegraf#Processor