intellij idea build setup in .idea

- use intellij
- remark this is optional, standalone build is still supported

.idea/libraries/artgaphics_0_1_0.xml

@@ -0,0 +1,9 @@
+<component name="libraryTable">
+  <library name="artgaphics-0.1.0">
+    <CLASSES>
+      <root url="jar://$PROJECT_DIR$/libs/artgaphics-0.1.0.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES />
+  </library>
+</component>