plot datalog file (datalog_20130306.txt) OK
tempearary files are stored at dump folder at beagle side
New m file plotdatalog.m to plot datalog.txt file
After gets() gets one line of data, we direct convert char into number by -'0', thus avoid using slow sscanf()
using gfit_PDF() in meanfile.m OK
readfile.m and meanfile.m in work_git_rdfile converts char to int by -'0', rather than using sscanf()

Signed-off-by: dxw <xuewu.dai@eng.ox.ac.uk>
OK. 22/03/2013