Public scoreboard stopwatch feature

#10

app/policies/contest_policy.rb

@@ -75,6 +75,26 @@ class ContestPolicy < ApplicationPolicy
     edit?
   end
 
+  def stopwatch?
+    edit?
+  end
+
+  def stopwatch_continue?
+    edit?
+  end
+
+  def stopwatch_pause?
+    edit?
+  end
+
+  def stopwatch_reset?
+    edit?
+  end
+
+  def stopwatch_start?
+    edit?
+  end
+
   def finalize_import?
     owner_or_admin
   end