get a child sprite's world postion

Signed-off-by: rainfiel <rainfiel@gmail.com>
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d

Conflicts:
	lib/sprite.c

Signed-off-by: rainfiel <rainfiel@gmail.com>
draw particle on anchor

Signed-off-by: rainfiel <rainfiel@gmail.com>
add rich_text support

Signed-off-by: rainfiel <rainfiel@gmail.com>
rich_text script

Signed-off-by: rainfiel <rainfiel@gmail.com>
add rich text example
label: fix issue when str is NULL
fix label.text gc error

Signed-off-by: rainfiel <rainfiel@gmail.com>
add game pause callback
fix list index error

Signed-off-by: rainfiel <rainfiel@gmail.com>
use english comment to avoid error in msvc
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
unload for ppm
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
增加是否启用屏幕内可见判断的接口
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
add draw call statistics
add on_puase callback
fix mac example font size error
rich text blend alpha with parent color