1. Added functions for encryption and decryption activation and setting KC and CipherID to GSMLogicalChannel.
2. Added functions for encrypt, decrypt, setting KC and CipherID to L1Encoder, L1Decoder and L1FEC.
3. Implemented decrypt and encrypt for XCCHL1 Decoder and Encoder, TCHFACCH Decoder and Encoder.
4. Added xor_apply function to BitVector and SoftVector.
5. Added libosmocore and libosmogsm dependences for using osmo_a5 and osmo_hexparse functions.