Convert the padding modes into a enum
Create ctr_enc() and ctr_dec() to create Encryptor and Decryptor trait objects
Commit 1
Commit 2
Commit 3
Commit 3 - mostly working.
Commit 4 - many fixups
Remove uncessary 'priv'
Minor example utility cleanups
Add in a (very slow) unit test
First bit of an implementation of a simple to use crypto library ala NaCl
Update .gitignore to ignore *.rlib files
Fixup the example encryptor program after Rust IO changes
Lots of updates to clan-symmetric Decryptor Reader
Fixup match in symmetric in  clanlib
Very minor clanlib symmetric updates
Add a reset() method to the symmetric cipher traits
Rust-Crypto: Implement Mac for ~Mac and &'a mut Mac
rust-crypto: Implement MacReader and MacWriter io helper utilities
Fixup last mac change