Export to virtualbox format

src/freedombone-image

 mv build/${PROJECT_NAME}*.bz2 ${CURR_DIR}
 mv build/${PROJECT_NAME}*.img ${CURR_DIR}
 mv build/${PROJECT_NAME}*.sig ${CURR_DIR}
-#rm -rf ${BUILD_DIR}
+rm -rf ${BUILD_DIR}
+
+cd ${CURR_DIR}
+if [[ $IMAGE_TYPE == "virtualbox"* ]]; then
+    imgfiles=(${PROJECT_NAME}*.img)
+    VBoxManage convertfromraw --format VDI ${imgfiles[0]} ${imgfiles[0]}.vdi
+fi
 
 clear
 echo "
 
     Password: $PASSWORD
 "
-cd ${CURR_DIR}
 ls -lh ${PROJECT_NAME}*.img ${PROJECT_NAME}*.sig ${PROJECT_NAME}*.bz2
 
 # record the default login credentials for later use