Add an example plugin

.idea/compiler.xml

@@ -6,10 +6,14 @@
         <sourceOutputDir name="target/generated-sources/annotations" />
         <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
         <outputRelativeToContentRoot value="true" />
+        <module name="acf" />
+        <module name="acf-example" />
         <module name="commands" />
       </profile>
     </annotationProcessing>
     <bytecodeTargetLevel>
+      <module name="acf" target="1.8" />
+      <module name="acf-example" target="1.8" />
       <module name="commands" target="1.8" />
     </bytecodeTargetLevel>
   </component>

.idea/encodings.xml

@@ -2,6 +2,7 @@
 <project version="4">
   <component name="Encoding">
     <file url="file://$PROJECT_DIR$" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/example" charset="UTF-8" />
     <file url="PROJECT" charset="UTF-8" />
   </component>
 </project>

.idea/modules.xml

@@ -3,6 +3,7 @@
   <component name="ProjectModuleManager">
     <modules>
       <module fileurl="file://$PROJECT_DIR$/acf.iml" filepath="$PROJECT_DIR$/acf.iml" />
+      <module fileurl="file://$PROJECT_DIR$/example/acf-example.iml" filepath="$PROJECT_DIR$/example/acf-example.iml" />
     </modules>
   </component>
 </project>