update version number to 1.0b25

update version number to 1.0b24

update version number to 1.0b23

update version number to 1.0b22

update version number to 1.0b21

update version number to 1.0b20

update version number to 1.0b19

update version number to 1.0b18

update version number to 1.0b17

update version number to 1.0b16