Update for Rust 0.6

Also disable AES_128_CTR and AES_256_CTR because they cause link
failures on OS X.
Remove debug prints in Crypter::final()
Tweak for rust trunk (c081ffb 2013-04-30 02:21:37 -0700)
Remove unnecessary `unsafe` blocks
Update for current incoming
Update for latest incoming (3a3bf8b)
Update to latest incoming (878a9b9)
Don't error on `make clean` if there is no dylib
Update for latest incoming (4a52ff0)
Remove unused use warning on latest incoming (eac0200)
Update for 0.7
Update for 0.8-pre (f503e53)
Merge pull request #1 from kballard/master

Merge changes from kballard