Move classifier_serv to core::classifer
Eliminate old code
added python.ml and ruby.ml
fixed OMakefile and main.ml to use ruby.ml and python.ml
fixed config.ml to use ruby.ml and python.ml
fixed ruby.ml and python.ml, split cpp.ml to cpp part(cpp.ml) and library part(lib.ml)
Merge branch 'release/0.4.2' into develop
Merge branch 'master' into develop
Merge branch 'master' into develop
show user friendly message on pkg-config errors (fix #290)
fixed (gen_def and gen_retval)
Move regression_serv to core::regression
Rename CW to confidence_weighted for #257.
Rename AROW to arow for #257.
Rename NHERD to normal_herd for #257.
Rename PA to passive_aggressive for #257.
Rename PA1 to passive_aggressive_1 for #257.
Rename PA2 to passive_aggressive_2 for #257.
Rename regression::PA to passive_aggressive for #257.
Move recommender_serv to core::recommender