As outlined by mail on the 13th of July the tree based approach to
decoding in the PCU is faster by order of magnitude. Instead of having a
slow implementation in the library and a quick one in the PCU, let's
only have a quick one in the PCU and at some point in the future move it
to libosmocore.
Execute the plan and remove t4_decode.
Change-Id: I021424444625a097560d086c217c81eac4a5ee44
Add bit map encoder and decoder functions: decoder is fully functional
while encoder is good enough for testing - no backtracking to find
the best possible compression is implemented. If somebody is willing to
implement MS side of EDGE than this has to be expanded.
Add corresponding tests.
N. B: the encoding is implemented according to ETSI TS 44.060 which is
slightly different from T4 used for fax according to CCITT G31D (RFC 804).
Ticket: OW#2407
Sponsored-by: On-Waves ehf
Signed-off-by: Max <msuraev@sysmocom.de>