Fix datamark - Rename to Win & improve core to read WIN format

Massive update to the Datamark reader, actually renamed to WIN. Datamark is a datalogger, WIN is the format recorded. 

Changes:
* Rename datamark to win
* Able to read 0.5 byte datawide packets
* Reads the full channel number as 4 char hex: 0000 to ffff (could add a test to isWin to check that?)

Results are validated against win2sac.c form S. Ohmi (http://www1.rcep.dpri.kyoto-u.ac.jp/~ohmi/utils/src/win2sac.c)

Todo:
* Check for missing seconds (gaps) and return the proper trace: first create as many traces as seconds in the file and then merge&split them.