Add --group-settings option

Only perform group settings update if --group-settings option is provided.

Closes: #22 (closed)

gsuitesync/__init__.py

@@ -3,7 +3,7 @@ Synchronise users to GSuite
 
 Usage:
     gsuitesync (-h | --help)
-    gsuitesync [--configuration=FILE] [--quiet] [--really-do-this]
+    gsuitesync [--configuration=FILE] [--quiet] [--group-settings] [--really-do-this]
 
 Options:
     -h, --help                  Show a brief usage summary.
@@ -12,6 +12,8 @@ Options:
 
     --configuration=FILE        Specify configuration file to load.
 
+    --group-settings            Also update group settings on all groups
+
     --really-do-this            Actually try to make the changes.
 
 """
@@ -42,4 +44,6 @@ def main():
     configuration = config.load_configuration(opts['--configuration'])
 
     # Perform sync
-    sync.sync(configuration, read_only=not opts['--really-do-this'])
+    sync.sync(configuration,
+              read_only=not opts['--really-do-this'],
+              group_settings=opts['--group-settings'])