fix #13
Create file
Test attribute methods
Use mockito
Fix expect and actual position
Add owner document test
Add test : getElementsByTagName
Add test : parentNode
Add test : nodeName
Add test : nodeValue, nodeType
Move text
Add test : previousSibling, nextSibling
Fix test lastChild
Add test : insertBefore
use component method to build all method about getParent and getChild
Add test : replaceChild
Modify test : insertBefore
Replace new ElementInter with document.createElement
close #31
Add test : removeChild