* Adding timezone during piwik install. Will set default timezone, and use it for the first created website.
 * Had to apply manual patch to QuickForm Select to handle optgroups, added unit tests to check patch is applied
 * Skips the Database check screen if there was no error


git-svn-id: http://dev.piwik.org/svn/trunk@2058 59fd770c-687e-43c8-a1e3-f5a4ff64c105