v6.0-beta.47

* Issue **#1172** : Fixed logging detail for viewing docs.

* Issue **#1166** : Fixed issue where users with only read permission could not copy items.

* Issue **#1174** : Reduced hits on the document permission cache.

* Issue **#1168** : Statistics searches now work when user only has `Use` permission.

* Issue **#1170** : Extra validation to check valid feed provided for stream appender.

* Issue **#1174** : The size of the document permissions cache is now configurable via the `stroom.security.documentPermissions.maxCacheSize` property.

* Issue **#1176** : Created index on document permissions to improve performance.

* Issue **#1175** : Dropping unnecessary index `explorerTreePath_descendant_idx`.

* Issue **#747** : XSLT can now reference dictionaries by UUID.

* Issue **#1167** : Use of folders to include child feeds and pipelines is now supported.