Re-enable AES and Fortuna
Rename static constants to have upper-case names
Update cfg attribute syntax in aes tests
Convert statics in fortuna.rs to consts
Work around what appears to be an optimizer bug present in Rust since 4b22178d325704d81522c15570498b7467b3152d
Merge pull request #132 from DaGenix/reenable-aes

Reenable aes