wr_streamers: modified to be compatible with legacy Btrain streamers + debugged changelog: - changed layout and sequence numbering: * layout: ethernet header | timestamp | seq id | block 0 + CRC | 0xcafe + inter-frame seq_no| block 1... * the seq_no is per-frame, internally, there is internal sequencing, first block is considered 0 but has only seq_no, not sub-frame seq_no, the latter blocks have sub-frame seq_no - added legacy generics - debugged