- goal table icon below datatable that have goal segmentation
- rss export icon below datatable
- cleaning code, refactoring, renaming goodness
- adding switch enable_detect_unique_visitor_using_settings that enables/disable heuristic based on config hash
- refactoring how plugins handle archiving for more clarity 

git-svn-id: http://dev.piwik.org/svn/trunk@838 59fd770c-687e-43c8-a1e3-f5a4ff64c105