Adding info about the 3rd party Gradle plugin (#438)

* Changed formatting of headers

* Link to eugene's plugin

README.md

@@ -15,13 +15,13 @@ A static code analyzer is a tool that flag suspicious language usage in code. Th
 
 Scalastyle is a similar linting tool which focuses mostly on enforcing style/code standards. There's no problems running multiple analysis tools on the same codebase. In fact it could be beneficial as the total set of possible warnings is the union of the inspections of all the enabled tools. The worst case is that the same warnings might be generated by multiple tools.
 
-### Usage
+## Usage
 Scapegoat is developed as a scala compiler plugin, which can then be used inside your build tool.
 
-#### SBT
+### SBT
 See: [sbt-scapegoat](https://github.com/sksamuel/sbt-scapegoat) for SBT integration.
 
-#### Maven
+### Maven
 
 Firstly you need to add scapegoat plugin as a dependency:
 
@@ -63,7 +63,11 @@ You can pass other configuration flags same way, e.g.
 
 Note: You may use a separate maven profile, so that the dependency doesn't go to you runtime classpath.
 
-#### Gradle
+### Gradle with a plugin
+
+Use [gradle-scapegoat-plugin by @eugene-sy](https://github.com/eugene-sy/gradle-scapegoat-plugin)
+
+### Gradle - manually
 
 Firstly you need to add scapegoat plugin as a dependency:
 
@@ -99,7 +103,7 @@ You can pass other configuration flags adding it to the `additionalParameters` l
 
 `"-P:scapegoat:disabledInspections:FinalModifierOnCaseClass"`
 
-#### Full list of compiler flags
+## Full list of compiler flags
 
 | Flag | Parameters | Required |
 |------|------------|----------|
@@ -115,7 +119,7 @@ You can pass other configuration flags adding it to the `additionalParameters` l
 |`-P:scapegoat:sourcePrefix:`|Overrides source prefix if it differs from `src/main/scala`, for ex. `app/` for Play applications.|false|
 |`-P:scapegoat:minimalLevel:`|Provides minimal level of inspection displayed in reports and in the console.|false|
 
-### Reports
+## Reports
 
 Here is sample output from the console during the build for a project with warnings/errors:
 
@@ -134,7 +138,7 @@ And if you prefer a prettier report, here is a screen shot of the type of HTML r
 
 ![screenshot](https://raw.githubusercontent.com/sksamuel/scapegoat/master/screenshot1.png)
 
-### Configuration
+## Configuration
 
 For instructions on suppressing warnings by file, by inspection or by line see [the sbt-scapegoat README](https://github.com/sksamuel/sbt-scapegoat).
 
@@ -351,7 +355,7 @@ class Test2 {
 ```
 
 
-### Other static analysis tools:
+## Other static analysis tools:
 
 * ScalaStyle (Scala) - https://github.com/scalastyle/scalastyle/wiki
 * Linter (Scala) - https://github.com/HairyFotr/linter