fix mac example font size error
rich text blend alpha with parent color
remove a rs_commit
bugfix: font size
code tab
update doc matrix
update doc matrix
flappybird
done bird
flappy bird 畅玩版
bugfix: unmount child should clear the parent
Merge internal-ejoy2d
remove dup code
Merge pull request #1 from ejoy/dev

merge internal code
bugfix: mount
noneed clear parent in lmount
add sprite.parent
auto unmount
remove some example code
bugfix: check uservalue is table