Merge pull request #7 from Khiyuan/master

Add an arg "simple" to show explainations only
Add option "--color" to control colorization.
Fix UnicodeEncodeError in python2.
Merge pull request #8 from stoolye/master

Add option "--color" to control colorization & Fix UnicodeEncodeError in python2.
code style optimzed for a bit little less ugly.
Merge pull request #1 from felixonmars/master

A try