Update Captcha9kw.py

Hey, I have a few proposals

BR Nippey

Line 54: At least for python2.5, I explicitly have to cast a string to an integer.
Line 89: hoster_options is a member of options?
Line 107-117: xxxx_option is undefined for me, wouldn't these also be members of options?
Line 133: Same as Line 54.
Line 237: We're calling a class method, 1st argument is always the class, arguments in parentheses are 2...x
Line 241: Same as 237