Fork block tests

Transaction WrongRLP tests

more rlps with first zeros

Transaction RLP Tests

wrong transaction RLPs correction

Block Tests

Encoded transaction comment

Block Rlps with invalid transactions

Introduce cryptography testing

 + First test case will check the interoperability
   for all clients to decrypt the cipher with AES in
   CTR mode.

In correct anyorder trie tests, where all permuations should have the same root, one can not have 2 keys with the same value.