transceiver: add "Not subject to CLA" to license headers

The included transceiver code is to be merged under GPL
with no existing signed Contributor License Agreement.

Signed-off-by: Thomas Tsou <ttsou@vt.edu>
Ported GPRS implementation from OpenBTS version 2.6 to version 2.8.
Added CSN1 lib and RLC/MAC message decoder and encoder.
Modified RLCMACTest.cpp.
Added printSizeofRLCMAC(), testRlcMacDownlink(), testRlcMacUplink() functions.
Added comparing resulting vectors.
Removed pointers to the header fields, these static variables were necessary only in Wireshark implementation.
Fixed decoding and encoding downlink RLC/MAC control block Header.
Moved CSN1 and RLC/MAC code to new GPRS directory.
Fixed GPRS/Makefile.am. Libgprs.la for RLCMACTest was lost.
Added GPRS parameters to OpenBTS configuration table.
Added UDPSocket for communication with RLCMAC application.
Added function for decoding GPRS RLC/MAC uplink data block.
Added RLC/MAC application.
 - Segmentation of upper layer PDUs into RLC data blocks and re-assembly of RLC data blocks into upper layer PDUs.
 - Segmentation of RLC/MAC control messages into RLC/MAC control blocks and re-assembly of RLC/MAC control messages from RLC/MAC control blocks.
 - NS and BSSGP protocol implementation for communication with OpenSGSN.
 - UDPSocket for communication with OpenBTS.
Added encoder for RLC/MAC downlink data control block.
Added segmentation of LLC PDUs into RLC data blocks.
Added packet uplink and downlink assignment, packet uplink ack, RLC/MAC Data and Control blocks dispatchers, gsmtap support for LLC PDUs.
Added sending GPRS downlink assignment on CCCH.
Separation of GPRS PCU application from main OpenBTS code and changing PCU architecture (First step).
1. pcu - main program for  GPRS PCU.
2. gprs_rlcmac - RLC/MAC layer implementation for PCU. Added list for TBF, TBF allocation, establishment, release.
3. gprs_bssgp_pcu - BSSGP protocol implementation for PCU.
4. pcu_l1_if - interface for communication PCU application with OpenBTS.
Fixed bugs in handling of TBFs.
Added L1 interface between PCU and OpenBTS for communication (PCU side).
Added L1 interface between PCU and OpenBTS for communication (OpenBTS side).