cipher init frequency directive for eStream

- filenames unified
- order of call in EACirc (prepare) changed!!
- new directive "CIPHER_INIT_FREQ" for eStream determining how often to
reinit ciphers with IV and key
- typo in method name in IProject interface
- new public method in IProject interface (projet initialization)
- EncryptorDecryptor chenges to allow IV and key change