Merge pull request #24 from lufylegend/1.8.9b

为LSprite增加拖拽功能startDrag和stopDrag，优化了ui组建中LWindow的拖拽
Merge pull request #25 from lufylegend/1.8.9b

関数名
関数名
Merge pull request #26 from lufylegend/1.8.9.a

関数名
関数名&变量名
Merge pull request #27 from lufylegend/1.8.9.a

関数名&变量名
1.8.9 examples
Merge pull request #28 from lufylegend/1.8.9.a

1.8.9 examples
multitouch examples
Merge pull request #29 from lufylegend/1.8.9.a

multitouch examples
1.8.9 update