Release of SemanticScuttle 0.90

Hi,
new release of SemanticScuttle (exploring semantic bookmarking tool).

This release provides a first integration with DOJO toolkit (http://dojotoolkit.org/) promising exciting AJAX interfaces and provides many security improvements.

All changes:
* Bug fix: correct XSS problems (prevent username with non-alphanumeric characters, protect profile page)
* Bug fix: protect parameters changes in profile.php (checking current user corresponding to profile page)
* Bug fix: test username's length (max 25) when registering (preventing problem with database
* Interface fix: hide SemanticScuttle version for non-admin (preventing some crackers' scripts)
* Bug fix: correct artviper (website thumbnails) identification [Config modified]
* New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit
* New feature: add users admin page (Thank you Arakel, Andreas Jaggi and Takuya Misawa)
* Bug fix: hide warning message due to gettext file (Thanks Arakel)
* Bug fix: correct renametag functions (Thank you Arakel and Andreas)
* Translation: add fr_CA translation (Thanks Pierre Lachance)