Knowledge UI (#779)

* knowledge button in HUD

* ui controller

* bugfixes

* finish

* all-knowing ghosts

* Create knowledge-ui.ftl

Content.Shared/Input/ContentKeyFunctions.cs

@@ -116,5 +116,9 @@ namespace Content.Shared.Input
         public static readonly BoundKeyFunction MappingRemoveDecal = "MappingRemoveDecal";
         public static readonly BoundKeyFunction MappingCancelEraseDecal = "MappingCancelEraseDecal";
         public static readonly BoundKeyFunction MappingOpenContextMenu = "MappingOpenContextMenu";
+
+        //CP14 keys
+        public static readonly BoundKeyFunction CP14OpenKnowledgeMenu = "CP14OpenKnowledgeMenu";
+        //CP14 keys end
     }
 }