show rendered image

added loading icon
image is scaled to available space

pdb-ui/src/main/java/org/lucares/pdbui/PropertyKeys.java

@@ -0,0 +1,14 @@
+package org.lucares.pdbui;
+
+public interface PropertyKeys {
+
+	/**
+	 * The path for generated images
+	 */
+	String PATH_GENERATED_IMAGES = "path.output";
+
+	/**
+	 * Path for temporary files
+	 */
+	String TMP_DIR = "path.tmp";
+}