a low mistake, edit readme

a low mistake - version error.  edit readme
fix a getParentElementByTag bug~

fix: Uncaught TypeError: Cannot read property 'tagName' of null
better readme

better readme
complex url and history test

complex url and history test
my eyes

my eyes, 一定是我太累了~
new version 2.0.1

new version 2.0.1
Merge pull request #30 from zhangxinxu/develop

Develop