Removed unused imports from iscomposing.py

Ignore-this: 8ff569e1c8fbdd8025b2c6732e3f5374

darcs-hash:20091116120549-b22ec-71818daefbb83c1433c5c9ed8137acdf6bb9c490
Fixed year in copyright message

Ignore-this: 53f20b80082c15cbf017b72c1497b39a

darcs-hash:20091116120853-b22ec-6d037c6af1265e52815ba9e43934ae6334ef6b81