Release 3.0.0-beta-8

- Change dependency from log4j to slf4j-api #28 (Tomas Dvorak)
- EetErrorConverter checks only error code and message, ignores environment type (#26) (Tomas Dvorak)
- Revert "removed bouncycastle dependency" (Tomas Dvorak)
- JCE - warning when limited keys length detected #29 (Tomas Dvorak)