Update sample text for CHN and JPN

This is about #525, but not a fix.

The changes include:

 - LiiBair should be LiBai (http://en.wikipedia.org/wiki/Li_Bai), which is the author of the poem
 - YihKing was probably 易经（http://en.wikipedia.org/wiki/I_Ching） in some pinyin system, but the quotation is actually from 道德经（http://en.wikipedia.org/wiki/Tao_Te_Ching)
 - Correct all characters in U+2Fxx range (since the fonts on my ubuntu do not cover this range, those characters are displayed as boxes. but on another machine with windows, it's quite difficult to tell them apart)
 - Correct weird symbols in the Japanese symbols
 - Add some reference links