XWIKI-11177 : Don't display the "Create a new wiki" link for users without the right to create a wiki
XRENDERING-365: Upgrade to joda time 2.5
Merge pull request #341 from vrachieru/patch-3

XWIKI-11177 : Don't display the "Create a new wiki" link for users witho...
XCOMMONS-657: Upgrade to Maven Checkstyle pluging 2.13
* exclude generated sources
XWIKI-11179: Wiki based ConfigurationSource don't take into account the passed class
* improve String handling
XCOMMONS-657: Upgrade to Maven Checkstyle pluging 2.13
* exclude generated sources
XWIKI-10887: "Retrieve username" and "Reset password" buttons are not aligned with the "Username" and "Email" fields
XWIKI-11163: Cache wiki-based configuration sources
* bulletproofing
XWIKI-10887: "Retrieve username" and "Reset password" buttons are not aligned with the "Username" and "Email" fields

- Restricting the selector, since the vertical-alignment produces layout alignment problems on FF for checkboxes
[misc] Updated page to the new XAR format
XWIKI-10932: Try to have the same height for "Variables" and "Preview" boxes on Flamingo Theme

* Increasing the height mannualy
XWIKI-10932: Try to have the same height for "Variables" and "Preview" boxes on Flamingo Theme

* Added a ‘row’ container in order to hold the grid elements, thus
better aligning components
* Removed ‘div’ from the id selectors
XWIKI-11163: Cache wiki-based configuration sources
* properly dispose wiki based configuration listeners
XWIKI-11163: Cache wiki-based configuration sources
* remove useless override
XWIKI-11179: Wiki based ConfigurationSource don't take into account the passed class
* bulletproofing
XWIKI-11179: Wiki based ConfigurationSource don't take into account the passed class
* add test
XWIKI-11190: The design of DW is broken during an upgrade between 5.4.5 to 6.2.1.

* Adding the skin to the URL of the default CSS.
XWIKI-11190: The design of DW is broken during an upgrade between 5.4.5 to 6.2.1.

* Adding a comment.
XWIKI-11192: /save/ action should wait instead of getting the intialization progress
* same for /preview/ action
[Misc] Add a better exception when LESS tries to compile a file that does not exist (or when the directory does not exist).