Add Bouncy Castle 1.7 + CVS-20130120 + PCL Patches
Add assembly reference
Remove old cryptography code
Add internal key factory

The key factory is responsible to import and export private and public keys. A private key will be encrypted during export.
The KeyGenerator generated now ECDSA keys and returns the new KeyPair class.
The license is now signed by the ECDSA+SHA512 algorithm
The license build needs to pass the private key pass phrase in order to decrypt the key
Add and remove the new/old files
fix formatting
Update unit tests to the new API
Add Bouncy Castle license