decrease alpha in biplot charts for "other families"

see comments on #49


Former-commit-id: 25eb661ab3a83b9d5a17855ff4e9913bd8981eea

ippisite/ippidb/templates/base.html

@@ -110,8 +110,8 @@
                 var scatterData = {
                 'datasets': [
                     { label: 'Other PPI families',
-                      borderColor: "rgba(211,211,211, 0.5)",
-                      backgroundColor: "rgba(211,211,211, 0.5)",
+                      borderColor: "rgba(211,211,211, 0.3)",
+                      backgroundColor: "rgba(211,211,211, 0.3)",
                       data: otherFamiliesData
                     },
                     { label: compoundFamily,