Added page with pokemon data on /tiers

client/views/navigation.jade

@@ -9,6 +9,7 @@ ul.nav
   li.nav_item.fake_link.nav_battle_list Battle List
   a(href="/replays", target="_blank").nav_item Your Replays
   a(href="/leaderboard/", target="_blank").nav_item Leaderboard
+  a(href="/tiers/", target="_blank").nav_item Tier List
   a(href="//bitbucket.org/PInsurgence/battle-simulator/issues?status=new&status=open", target="_blank").nav_item Bug Reports
   a(href="//forums.p-insurgence.com/c/battle-simulator/feature-requests", target="_blank").nav_item Feature Requests