[master][env] Merge branch u104.

Merge below commit:

commit 7b3063f53dce63f1e07e0ff00dfdaff3576f106c
Author: starleoda <starleoda@gmail.com>
Date:   Mon Oct 28 10:54:57 2013 +0800

Including below changes:

1. Removing unused files.
2. Improve ihelp output.
3. Add unwanted-space-highlight in vim.
4. Refine ip/util/image.