hop by hop encryption define
Merge branch 'master' of github.com:petrs/WSNProtectLayer
Merge branch 'master' of github.com:petrs/WSNProtectLayer
PrivacyLevel component finished. CryptoP - fixed verify signature. privMsg changed.

* PrivacyLevel component works as expected.
  - Rebroadcasts new valid messages.
  - Manages global counter (newly added!).
  - Logic similar to ForwarderP.
  - Using PLInit to load SharedData (for global counter).

* CryptoP - fixed problem with verify signature, memcompare is performed only one (with cons. with Jirka).
* Message for privacy level change modified, has to contain counter and signature inside the message.