A few minor bug fixes.  This will be the final release in the 7.3 line.

 - fix: relative links sent out in emails don't work properly
 - fix: macros not processed in HttpProxy template
    http://www.webgui.org/bugs/tracker/macro-not-working-i-httpproxy
 - fix: navigation shows toolbar for users who can't edit it
    http://www.webgui.org/bugs/tracker/navigation-shows-edit-button-to-users-without-permission
 - fix: additional template editing problems
 - Add user to transactions list and pending transactions.
 - Allow editing previous revisions of assets in the current version tag
 - fix: autolinking in wiki pages with manual links didn't work properly
 - fix: javascript errors in SQL Form date inputs in IE