XWIKI-9661: Missing entry point for the Statistics application
XWIKI-9553: Deleted users still appear in the "Top Active Members" list with a broken link.

* Fixed.
Merge pull request #198 from gdelhumeau/XWIKI-9553

XWIKI-9553: Deleted users still appear in the "Top Active Members" list ...
XWIKI-9667: Missing entry point for the Scheduler application
XWIKI-9632: Introduce generic WikiStream UI
* improve progress display
XWIKI-9632: Introduce generic WikiStream UI
* register WikiStream home page in applications panel
XWIKI-9632: Introduce generic WikiStream UI
* register WikiStream home page in applications panel
XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-manager and xwiki-platform-workspace.

* Fix migration bugs.
Merge pull request #199 from gdelhumeau/new-wiki-api

XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-mana...
XWIKI-9669: Remove workspaces
XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-manager and xwiki-platform-workspace.

* Fix migration bugs.
Merge pull request #200 from gdelhumeau/new-wiki-api

XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-mana...
XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-manager and xwiki-platform-workspace.

* Fix HTML validaity.
XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-manager and xwiki-platform-workspace.

* Fix bug.
XWIKI-9176: New XWiki Syntax Guide
* bulletproofing
Merge pull request #201 from gdelhumeau/new-wiki-api

XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-mana...
XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-manager and xwiki-platform-workspace.

* Minor fix.