Strip Available - from legend

as this is redundant

Fixes #127

app/assets/javascripts/main.js.erb

@@ -81,11 +81,11 @@ $(function() {
 
   var icons = {
     available: {
-      name: 'Available - Drains to Sewer',
+      name: 'Drains to Sewer',
       icon: '<%= image_path 'markers/tosewer.png' %>'
     },
     availableBay: {
-      name: 'Available - Drains to Ocean/Bay',
+      name: 'Drains to Ocean/Bay',
       icon: '<%= image_path 'markers/tobay.png' %>'
     },
     adopted: {