Fix a bug in the *.spec files and also apply the following major changes:

- Add support for adding the base folder to PATH.
- Only display one pop up window at a time in order to avoid confusion.
- Add automatic updates feature:
	- Windows and Linux versions will be shipped with an updater program used to
	  update both Artemis and the updater itself.
	- MacOs versions will not have the updater. Instead the user will be asked
	  to download the new software version (if present) via browser.

.gitignore

@@ -1,8 +1,9 @@
 __pycache__
 Data
-csv_info.txt
-src/themes/.current_theme
+src/themes/__current_theme
 designer.bat
 launch.bat
 .vscode/
 .code-workspace
+spec_files/**/output
+*.txt