* Scheduled PDF reports by email work as expected 
  * fixed issue with current week used instead of last finished period, 
  * fixed issue that all recipients were listed in the same TO: field, now sending one email per address.
  * Super user API methods will return all PDF reports by default, but UI now only displays PDF created by Super User.
 * Refs #1184 Better logging of what task was ran and how long it took
 * The API call to run scheduled tasks must also be ported to Powershell refs #1411

git-svn-id: http://dev.piwik.org/svn/trunk@2737 59fd770c-687e-43c8-a1e3-f5a4ff64c105