make libsvm_predict() returns the mse
create get_y_true_libsvmdata()
add comments on delta and non-delta sample files generated during vertex expansions
on mode 14, change writing dir
changes on writing log for interleaved training svr
Merge branch 'v.4.12.1' into v.4.12
increase the buffer size in get_n_lines()
add sanity checks after data preprocessing; plus add one element in svr ml_data log
(1) change the Data type from a map to a vector of pairs
(2) necessary adjustments because of (1)
Merge pull request #43 from tttor/v.4.12

V.4.12