XWIKI-8353: Retire usertools plugin
XWIKI-8352: Retire old "userdirectory" plugin

REST Improvements

* new REST apis for querying using hql, xwql and lucene (lucene allows multiwiki querying) 
* querying api also allows to read full objects associated to returned pages (using classname 
  parameter)
* additional fields in search results and space document list (adding author, modified date 
  and version and nice author names when using prettynames=true)
* fixes or improvements to start, number and order parameter to allow proper ordering and 
  pagination.
* Moved REST components to internal packages.

Reviewing pull request

* Fixed a possible NPE.

Applied patch from Lukasz Skowronski with corrections

  - fix the hibernate config to have no impact on other DB than HSQLDB and to be more easy to be edited by a sed script

XWIKI-7681 : Improve gadget's container styling in INLINE mode to better suggest dragging and delimitation

Reviewing pull request

* Minor changes (suppress checkstyle errors on resource class)

XWIKI-8337: The News IRC Bot Listener doesn't work in multiwiki mode
* Use the new CLIRR ignore to ignore one violation only and not the whole file!

* Better fix

+ Protect against errors when the bot is not yet fully connected to the channel

Reviewing pull request

* Added a less restrictive check when returning object data in query results (i.e., make
  sure that the user is *logged* and has the right to view the page the object belongs to)

Fixed.

Fixed.

XWIKI-8333: The links on the top navigation menu ignores the configured default document and space and always links to Main and WebHome
Fixed + several other replacements of string API calls with reference API calls

XWIKI-8332: New model scriptservice API for getting the current (or default) value for a specific entity type
Done.