update ctr feature number
weight tuning can be float number
add feature debug information `gain' in regression tree
feature analysis: feature gains are added
add univariate_feature_analysis
update univariate_feature_analysis
update feature number
update univariate_feature_analysis
update ctr
update univariate feature analysis
update feature number
feature influence for cases
add predict tool
add files
modified
reconstruct of absolute gain
add doc files 20140409 dongyu