* fixing a bug in ''Piwik::getPrettyValue()'' where a revenue evolution would be  prettified like so: ''$ 100%''
 * fixing a bug happening when no data is available for the selected day
 * when MultiSites plugin is deactivated, invite user via SMS to activate it back
 * SMS API accounts are now managed using an API key instead of a username and a password
 * adding ''[too long]'' at the end of the SMS content when it reaches the maximum length allowed by the SMS API
 * support for UCS-2 characters
 * Mediaburst rebranded to Clockwork
 * various UI improvements based on comment:31:ticket:2708
 * PDFReport.generateReport now supports $outputType=3 : output report in browser
 * removing non-libre select-to-autocomplete jQuery plugin
 * tracking count of phone number validation requests and SMS sent
 * SMS content now contains CoreHome_ThereIsNoDataForThisReport when applicable
 * setting SMS From with General_Reports when configured report is MultiSites_getAll
 * adding Clockwork description

TODO
 * using POST instead of GET to send SMS to go around a Clockwork limitation

git-svn-id: http://dev.piwik.org/svn/trunk@6727 59fd770c-687e-43c8-a1e3-f5a4ff64c105