docs(configuration): add links to plugin, loader, and examples in devtool doc (#1166)

Author: simon04

content/configuration/devtool.md

@@ -8,14 +8,18 @@ contributors:
   - lricoy
 ---
 
-This option controls if and how Source Maps are generated.
+This option controls if and how source maps are generated.
+
+Use the [`SourceMapDevToolPlugin`](/plugins/source-map-dev-tool-plugin.md) for a more fine grained configuration. See the [`source-map-loader`](/loaders/source-map-loader/) to deal with existing source maps.
 
 ## `devtool`
 
 `string` `false`
 
 Choose a style of [source mapping](http://blog.teamtreehouse.com/introduction-source-maps) to enhance the debugging process. These values can affect build and rebuild speed dramatically.
 
+T> The webpack repository contains an [example showing the effect of all `devtool` variants](https://github.com/webpack/webpack/tree/master/examples/source-map). Those examples will likely help you to understand the differences.
+
  devtool                      | build | rebuild | production | quality
 ------------------------------|-------|---------|------------|--------------------------
  eval                         | +++   | +++     | no         | generated code