Group project-related stats into a class.

Reduce number of instance variables available to the views.
Replace raw SQL with AR-type query.

app/models/stats/projects.rb

@@ -0,0 +1,22 @@
+module Stats
+  class Projects
+
+    attr_reader :user
+    def initialize(user)
+      @user = user
+    end
+
+    def runtime
+      @runtime ||= user.projects.active.order('created_at ASC').limit(10)
+    end
+
+    def actions
+      @actions ||= Stats::TopProjectsQuery.new(user).result
+    end
+
+    def actions_last30days
+      @actions_last30days ||= Stats::TopProjectsQuery.new(user, 1.month.ago.beginning_of_day).result
+    end
+
+  end
+end