ToBigInt(), uint64ToBigInt()
refactor - dangling branches, unmarshalGetResponse()
removed dead code - decode()
decodeValue() - set Type correctly (gauge32 tests)
more detailed debugging; remove extraneous comments
parseUint() - Counter32, Gauge32
verax testing, doco
verax tests in order
ToBigInt() - no pdutype
wip - packet lengths...
wip - start using calc_length()
completed switchover to calc_length()
wip string - sort of working