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
fix ppm when only pgm exist
Merge pull request #60 from cdd990/master

fix ppm when only pgm exist
Merge branch 'master' into public
modify newlable default arg setting and label getcolor fund
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
remove texture coord offset. TODO: NPOT texture coord is not correctly
texture 添加获取纹理大小、交换纹理等接口
unmount sprite when mount -- temply for a ugent bug
fix sin/cos table lookup out of range