Merge pull request #128 from DaGenix/fixups

Enable slicing_syntax and disable AES implementations
Disable Fortuna
Enable slicing_syntax in rust-crypto-util
Convert 'static's used in constant expressions to 'const'
Merge pull request #131 from ebfe/fix-build-master

Fix build with rust master
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
Run fortuna tests
Merge pull request #133 from ebfe/test_fortuna

Run fortuna tests
fail! -> panic!
Merge pull request #135 from ebfe/fix-build-master

fail! -> panic!
dead_assignment -> unused_assignments
Merge pull request #136 from PeterReid/dead-assignment-rename

dead_assignment -> unused_assignments
Revert "Work around what appears to be an optimizer bug present in Rust since 4b22178d325704d81522c15570498b7467b3152d"

This reverts commit 70a13bce52f08493649fffdf3d741b01a3d1c224 since the bug
no longer appears to be present in Rust.