Deprecate Fund and Phortune prototype applications

Summary: See T15726

Test Plan: Go to `/applications/` and see that Fund and Phortune say "Deprecated".

Reviewers: O1 Blessed Committers, speck

Reviewed By: O1 Blessed Committers, speck

Subscribers: speck, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno

Differential Revision: https://we.phorge.it/D25533

Author: aklapper

src/applications/fund/application/PhabricatorFundApplication.php

@@ -30,6 +30,10 @@ public function isPrototype() {
     return true;
   }
 
+  public function isDeprecated() {
+    return true;
+  }
+
   public function getRemarkupRules() {
     return array(
       new FundInitiativeRemarkupRule(),

src/applications/phortune/application/PhabricatorPhortuneApplication.php

@@ -30,6 +30,10 @@ public function isPrototype() {
     return true;
   }
 
+  public function isDeprecated() {
+    return true;
+  }
+
   public function getRoutes() {
     return array(
       '/phortune/' => array(