refs #5896 wondering if any test fails if we support filter_limit and filter_offset on arrays. would be useful for Piwik Mobile
refs #5896 did not know it would cast the default value...
refs #5896 added many tests to make sure the array filter works
Merge pull request #6008 from piwik/5896_filter_limit_support_for_arrays

refs #5896 filter_limit and filter_offset support for indexed arrays