[seiscomp, scanloc] Install, add .gitignore

etc/defaults/scevtlog.cfg

@@ -0,0 +1,13 @@
+connection.username = scevtlog
+connection.subscriptions = EVENT, LOCATION, MAGNITUDE, PICK, AMPLITUDE
+
+# The output directory
+directory = @LOGDIR@/events
+
+# The format to use to log events.
+# Possible formats are: autoloc1, autoloc3 and xml.
+# For compatibility reasons autoloc3 is the default
+# format, but it is recommended to use xml, because
+# it can be converted in autoloc1 and autoloc3 using
+# scbulletin.
+format = xml