Add the support suppressWarnings, verbose and version in build tools.

libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/KotlinCompileMojoBase.java

@@ -64,6 +64,13 @@ public abstract class KotlinCompileMojoBase<A extends CommonCompilerArguments> e
         return defaultSourceDirs;
     }
 
+    /**
+     * Suppress all warnings.
+     *
+     * @parameter default-value="false"
+     */
+    public boolean nowarn;
+
     // TODO not sure why this doesn't work :(
     // * @parameter default-value="$(project.basedir}/src/main/resources"
 
@@ -238,6 +245,8 @@ public abstract class KotlinCompileMojoBase<A extends CommonCompilerArguments> e
             throw new MojoExecutionException("No source roots to compile");
         }
 
+        arguments.suppressWarnings = nowarn;
+
         arguments.freeArgs.addAll(sources);
         LOG.info("Compiling Kotlin sources from " + sources );