Add magic comments for emacs and vi in source and header files to properly format and display tabs vs. spaces in those editors:

/* For Emacs:
 * Local Variables:
 * mode:c
 * indent-tabs-mode:nil
 * tab-width:4
 * c-basic-offset:4
 * End:
 * For VIM:
 * vim:set softtabstop=4 shiftwidth=4 tabstop=4 expandtab:
 */


git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3462 d0543943-73ff-0310-b7d9-9358b9ac24b2