added caching to the Blah.interesting methods

app/models/crop.rb

@@ -95,6 +95,7 @@ class Crop < ActiveRecord::Base
       interesting_crops.push(c)
     end
 
+    Rails.cache.fetch("interesting_crops", :expires_in => 1.day)
     return interesting_crops
   end
 

app/models/member.rb

@@ -188,6 +188,7 @@ class Member < ActiveRecord::Base
       next unless m.plantings.present?
       interesting_members.push(m)
     end
+    Rails.cache.fetch('interesting_members', :expires_in => 1.day)
     return interesting_members
   end
 

app/models/planting.rb

@@ -83,6 +83,7 @@ class Planting < ActiveRecord::Base
       interesting_plantings.push(p)
     end
 
+    Rails.cache.fetch("interesting_plantings", :expires_in => 3.hours)
     return interesting_plantings
   end
 end

app/models/seed.rb

@@ -41,6 +41,7 @@ class Seed < ActiveRecord::Base
       interesting_seeds.push(s)
     end
 
+    Rails.cache.fetch('interesting_seeds', :expires_in => 6.hours)
     return interesting_seeds
   end