Fixes #2159, allow limit dropdown to be used with evolution graphs (including row evolution).

Notes:
  * Bug fix for RowEvolution.php: length of evolution was one date too long.
  * Added new query parameters: evolution_{$period}_last_n
  * Bug fix for ViewDataTable::setColumnsToDisplay, column array should be filtered before being set.
  * Removed default value for idGoal parameter for AddColumnsProcessedMetricsGoal filter.
  * Bug fix for Period/Range.php: lastN should be decremented AFTER it is checked for the max value.
  * Bug fix for Period/Range.php (in fillArraySubPeriods): fix issue when determining subperiods for range of weeks.



git-svn-id: http://dev.piwik.org/svn/trunk@7068 59fd770c-687e-43c8-a1e3-f5a4ff64c105