Update to rust 0.8-pre
Add destructors to all the types that need destructing
Rename crypto.rc to crypto.rs
Replace constructors fns with static methods
Remove pkey::ANYKEY
Merge remote-tracking branch 'remotes/kballard/master'

Conflicts:
	crypto.rs
	hash.rs
	pkcs5.rs
	pkey.rs
	rand.rs
	symm.rs
Merge pull request #2 from erickt/master

Merging up