this version gen result: 4.txt
using biokw without stopwords
Set Score=2 and add field words. This version gen result: 7.txt
For bio extractor: decrease the max length of a bio(set to 800char now). Add space to stick words.
 Add edu extractor.
修改了getHtmlTxt方法，读取每行时将换行符替换成一个空格。增加了新的degree word。
// solve the case like: I got my M.S and Ph.D from SYSU.
// Solution: simply padding last school to make degrees' size equal to schools'
Refine code.
Refine code. provide method to get bio pages in second level.
refine algorithm. especially the method getText()