Add event handler for midnight shot detection.

This event handler checks if there is an UTC date jump between
consecutive shots. If a jump is detected, it sends to new entries
to the event log, for the last shot and first shot of the previous
and current dates, respectively.

Fixes #223.

lib/www/server/events/handlers/index.js

@@ -1,5 +1,6 @@
 const Handlers = [
-	require('./detect-soleol')
+	require('./detect-soleol'),
+	require('./detect-fdsp')
 ];
 
 function init () {