Assign default permissions on user branches

By default each user should be able to read and update the own user
branch. Also the user should be able to approve and submit changes for
the own user branch. Assign default permissions for this and remove the
old exclusive read protection from the user branches.
diff --git a/project.config b/project.config
index 3a16081..09e0f83 100644
--- a/project.config
+++ b/project.config
@@ -8,6 +8,11 @@
 	push = group Administrators
 [access "refs/users/${shardeduserid}"]
 	read = group Registered Users
+	read = +force group Registered Users
 	push = group Registered Users
+	push = +force group Registered Users
 	submit = group Registered Users
+	submit = +force group Registered Users
 	exclusiveGroupPermissions = read push submit
+	label-Code-Review = -2..+2 group Registered Users
+	label-Verified = -1..+1 group Registered Users