Response Validation & Processing

- [x] Add Response Precondition checking
- [x] Add Response signature verification
- [x] Add Response Validation
- [X] Add Response Assertion Decryption
- [x] Add Response Assertion Validation
- [x] Add Response Assertion Transformers
- [ ] Test all the things
Might I suggest "assertionMustBeEncrypted" or "isAssertionEncryptionRequired" otherwise it seems to suggest that you know that the assertion is already encrypted. But you still have to wait and see.