Renamed the project from "Salut à Toi" to "Libervia":

This renaming follows the decision taken at the General Assemblee of January 27th 2021 (cf.
https://repos.goffi.org/sat_docs/raw-file/tip/association/2021-01-27%20-%20compte%20rendu%20de%20l%27AG%20extraordinaire.pdf)

setup.py

@@ -59,7 +59,7 @@ extras_require = {
 }
 
 DBUS_DIR = 'dbus-1/services'
-DBUS_FILE = 'misc/org.salutatoi.SAT.service'
+DBUS_FILE = 'misc/org.libervia.Libervia.service'
 with open(os.path.join(NAME, 'VERSION')) as f:
     VERSION = f.read().strip()
 is_dev_version = VERSION.endswith('D')