Changelog:
* Fix long polling with nginx (again).
* Any requests with unrecognized host header will no longer have a 404
response, but an empty response.
* API:
  * Nobody can push 'internal.*' events from API.
  * Now sent metadata when uploading a file can be retrieved through the
corresponding internal.file.add event.
  * Update file upload api to allow metadata in multipart/form-data.
  * Add *forceContentType* parameter on file upload api.
  * Add an *order* parameter when listing files on a meeting.
  * Support of OPTIONS with better CORS handling (thanks elishowk).
  * Support of HEAD method.
  * Many bug fix.
* ucejs:
  * add `UCEngine.meeting(name).can` and
`UCEngine.meeting(name).canCurrentUser`.
* Filesharing brick
  * The brick add an *uploadedby* metadata when uploading generated images.
* Refactored ucengine-admin
  * the domain as first argument (except for *time get*).
  * No more options when options are mandatory.
* Add *bind_ip* config parameter.
* Renamed *root* config parameter to *wwwroot*.
* Moved *priv/www* to *wwwroot/*
* Improved many widgets.
* Improved documentation.
* Bricks have been extracted from U.C.Engine main repository.
* Widgets have been extrated from U.C.Engine main repository.
Full changelog: http://docs.ucengine.org/changelog.html
François