Fix update.box_resize
Fix update.box_resize

1) It now properly preserves rigid bodies when the box is resized.
2) It now properly updates the particle and body image flags

git-svn-id: 5cda8128732f5b679951344c24659131be7d2dfc@4070 fa922fa7-2fde-0310-acd8-f43f465a7996

joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue