Added a raw download servlet at URL http://.../alfresco/dr?contentUrl=...?ticket=...

Added ContentService.getRawReader to get content directly using a content URL.  To access this, you need to be admin.
Fixed EHCacheAdapter to handle non-Serializable values.
Added tests for above and for AbstractRoutingContentStore.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5841 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/content/AbstractContentStore.java

@@ -86,6 +86,10 @@ public abstract class AbstractContentStore implements ContentStore
      * @param contentUrl a URL of the content to check
      * @return Returns the relative part of the URL
      * @throws RuntimeException if the URL is not correct
+     * 
+     * @deprecated  Stores can really have any prefix in the URL.  This method was
+     *              really specific to the FileContentStore and has been moved into
+     *              it.
      */
     public static String getRelativePart(String contentUrl) throws RuntimeException
     {