Switch project so src layout

This will make it possible to build pip packages.
Add a make file to compile UI files and build mac and win applications.

.idea/misc.xml

@@ -4,7 +4,7 @@
     <option name="languageLevel" value="ES6" />
   </component>
   <component name="ProjectPlainTextFileTypeManager">
-    <file url="file://$PROJECT_DIR$/revpicommander/locale/revpicommander_de.ts" />
+    <file url="file://$PROJECT_DIR$/src/revpicommander/locale/revpicommander_de.ts" />
   </component>
   <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.9 (revpicommander)" project-jdk-type="Python SDK" />
   <component name="PythonCompatibilityInspectionAdvertiser">