String trimming all parameter values returned by parameter::get. Was motivated to do this after I was contacted by Gregor Obernoster who couldn't get acs_community_member_link to work because of an accidental trailing slash in the CommunityMemberURL param.
a small change for the 1.0 dotlrn release - changing links in the footer of the master template from MIT links to links to dotlrn home and dotlrn project central