aligned_holder should not be copyable

git-svn-id: svn://svn.code.sf.net/p/libtorrent/code/branches/RC_1_0@10519 a83610d8-ad2a-0410-a6ab-fc0612d85776
improve clean.py

git-svn-id: svn://svn.code.sf.net/p/libtorrent/code/branches/RC_1_0@10520 a83610d8-ad2a-0410-a6ab-fc0612d85776