fix RectToRoi bug...

1.增加了可以控制截图起始点的功能（只针对picture、check两种模式）2.修改了check模式不需要清空savepath的bug

add os._exit(0)

add 'f' in CheckGt to move front

rearrange if-else

extend candidate labels to maxsize=5, and fix if-else sentence

fix bugs in CheckGt - LABEL mode

delete tmp file

add 3 modes in CheckGt without testing

add label output for each posGt

add label mode, initial commit

fix bug in checkrecursion

revise mser -> bbox method

fix checkGt bug, when one input 'back'

if height<10, we delete it