Improved the trac integration
Improved the trac integration

* trunk/contrib/client-side/psvn/psvn.el:
  svn-browse-url-function: new variable to specify the browser to use
  svn-global-trac-map: Keymap to access the trac functions via keyboard
  (svn-browse-url): browse a given url via svn-browse-url-function
  (svn-trac-browse-changeset): new function to show a changeset in
     the trac issue tracker
  (svn-trac-browse-ticket): new function to show a ticket in
     the trac issue tracker


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@855100 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion