update shindig-caja integration (issue 6304061)

[fe...@gmail.com]

Reviewers: Jasvir,

Message:
ok, rebased from trunk and uploaded here, since
https://reviews.apache.org/r/5202/ is down

Description:
Shindig's Caja integration is using a year-old version of Caja, and
doesn't really work because of bad interaction with Closure compiler.

This patch updates Shindig to use a recent version of Caja.

With this patch, the SocialActivitiesWorld demo works with or without
Caja enabled.

Please review this at http://codereview.appspot.com/6304061/

Affected files:
   D     features/src/main/javascript/features/caja-debug/feature.xml
   D     features/src/main/javascript/features/caja-guest-frame/feature.xml
   D     features/src/main/javascript/features/caja-taming-frame/feature.xml
   A     features/src/main/javascript/features/caja/caja-debug.xml
   A     features/src/main/javascript/features/caja/es53-guest-frame.opt.xml
   A     features/src/main/javascript/features/caja/es53-guest-frame.xml
   A     features/src/main/javascript/features/caja/es53-taming-frame.opt.xml
   A     features/src/main/javascript/features/caja/es53-taming-frame.xml
   M     features/src/main/javascript/features/caja/feature.xml
   M     features/src/main/javascript/features/caja/taming.js
   M     features/src/main/javascript/features/core.json/taming.js
   M     features/src/main/javascript/features/features.txt
   M     features/src/main/javascript/features/gadgets.json.ext/taming.js
   M     features/src/main/javascript/features/osapi.base/osapi.js
   M     features/src/main/javascript/features/osapi.base/taming.js
   M      
java/gadgets/src/test/java/org/apache/shindig/gadgets/servlet/CajaContentRewriterTest.java
   M      
java/server/src/test/java/org/apache/shindig/server/endtoend/AllJsFilter.java
   M     pom.xml