cleanup and introducing plugin structure

.idea/modules/PixelPic.main.iml

@@ -11,4 +11,8 @@
       </configuration>
     </facet>
   </component>
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
 </module>