rename class and made more generic so that it handles all featureloced...

rename class and made more generic so that it handles all featureloced features e.g. similarity, polypeptide_domain


git-svn-id: svn+ssh://svn.internal.sanger.ac.uk/repos/svn/pathsoft/artemis/trunk@8426 ee4ac58c-ac51-4696-9907-e4b3aa274f04