Rename project (#4)

Author: fank

LICENSE

@@ -631,7 +631,7 @@ to attach them to the start of each source file to most effectively
 state the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
 
-    files-preview-python-api generates images based on .msg files.
+    msg-previewer generates images based on .msg files.
     Copyright (C) 2024  enthus GmbH
 
     This program is free software: you can redistribute it and/or modify
@@ -652,7 +652,7 @@ Also add information on how to contact you by electronic and paper mail.
   If the program does terminal interaction, make it output a short
 notice like this when it starts in an interactive mode:
 
-    files-preview-python-api  Copyright (C) 2024  enthus GmbH
+    msg-previewer  Copyright (C) 2024  enthus GmbH
     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
     This is free software, and you are welcome to redistribute it
     under certain conditions; type `show c' for details.