Updated EdDSA code

Source:
https://github.com/str4d/ed25519-java
Git commit:
58e4efadf972f4dc4f67c05152f82b49fb22bac6
Added EdDSA tests

Source:
https://github.com/str4d/ed25519-java
Git commit:
58e4efadf972f4dc4f67c05152f82b49fb22bac6