Bumping to v0.0.2-pre
Adding .h equivallents from nettle
aes somewhat complete
Adding leftover files from file rename s/-/_/g
RC4 bindings.
Turning of `make check` for nettle.

Eventaully, nettle-sys will come with its own checks. (And make check is quite cumbersome for development.)
RC2 bindings added.
Setting the nettle submodule to release version 3.0 for stability
Refactoring deprecation warnings for AES
Removing test data.
Refactoring AES for safe rust interface.
Finished AES. More test vectors would be good, though.
v0.0.2 - AES pretty much complete