修改获取label颜色不对的bug
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
function ‘text_size’ add size value return
lable:text_size does not depend on dfont any more

Signed-off-by: rainfiel <rainfiel@gmail.com>
simple visible exclude
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
simple multi texture blend
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d

Conflicts:
	lib/sprite.c
support fetch sprite by component index
add blend shader and fetch_by_index function
fix get alpha error
Merge branch 'master' into public