- fixed a bug in ezxml_add_child() that can occur when adding tags out of order
- for consistency, ezxml_set_attr() now returns the tag given
- added ezxml_move() and supporting functions ezxml_cut() and ezxml_insert()
- fixed a bug where parsing an empty file could cause a segfault


git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4081 d0543943-73ff-0310-b7d9-9358b9ac24b2