Yiping: add simple method to dictionary
Merge branch 'master' of ssh://cte.comp.nus.edu.sg/home/wing.nus/GITRepositories/wing.nus/WING-LDA
Perplexity done.
Merge branch 'master' of ssh://cte.comp.nus.edu.sg/home/wing.nus/GITRepositories/wing.nus/WING-LDA