ENH: Changed Nightly start time

DartConfig.cmake

@@ -1,3 +1,7 @@
+# Dashboard is opened for submissions for a 24 hour period starting at
+# the specified NIGHLY_START_TIME. Time is specified in 24 hour format.
+SET (NIGHTLY_START_TIME "22:00:00 EST")
+
 # Dart server to submit results (used by client)
 SET (DROP_SITE "public.kitware.com")
 SET (DROP_LOCATION "/incoming")