CAPTCHA ttf_image: added variant. Adjusted character-pool and one background for better readability.
Added preview-images for CAPTCHA. Improved security: CAPTCHAS can't be loaded from outside WB
fixed some issues with CAPTCHA and ASP: Adjusted baseline of '*' in supplyed fonts to meet baseline of numbers. Added counter to ttf_image generation-loop. Removed now unneeded GD-lib checks. Improved ASP in news-module.
Added keywords to files where they are missing
ttf-CAPTCHA: check if string is completely inside the image.
added new CAPTCHA and ASP (Advanced Spam Protection)