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.

make.bat

@@ -1,7 +0,0 @@
-@echo off
-pyinstaller --noconfirm --clean -D --windowed ^
-    --add-data="data\\revpicommander.ico;." ^
-    --add-data="revpicommander\\locale;.\\locale" ^
-    --icon=data\\revpicommander.ico ^
-    --path=include ^
-    revpicommander\revpicommander.py