Fixed error with # Days with Obs Table

Fixed an error in skin.conf that calculated incorrect values in the Number of days with Observations table on the summary.html page.

skin.conf

@@ -351,7 +351,7 @@
     [[temp_count]]
         obs_type = outTemp
         aggregate_type = sum_ge
-	aggregate_threshold = -50, degree_F
+	aggregate_threshold = -150.0, degree_F
 	minvalues =  0, 2, 4, 6, 8, 12, 15, 18, 21, 24, 27
 	maxvalues =  2, 4, 6, 8, 12, 15, 18, 21, 24, 27, 32
 	colours =   "#0029E5", "#0186E7", "#02E3EA", "#04EC97", "#05EF3D2", "#2BF207", "#8AF408", "#E9F70A", "#F9A90B", "#FC4D0D", "#FFFFFF"