1. Recompile the libsvm and python interface.

2. When running the tool, uses the following command:
python ./model_select.py datafile_name logfile_name 0 0 1 0 1

Where the first "0 0" denotes the starting point
and 1 0 1 relates to the detail implementation.
( But I think "0 0 1 0 1" would be good parameter to start. )

3. the format of logfile is as follows:
[lnC, lnSigma] [GradC, GradSigma] [DirC, DirSigma] f(lnC, lnSigma) |Grad f|
