Skeleton of the base class
added recaptcha library class
added CaptchaFactory class as well as classes for Recaptcha.
Also added in code to MultiCaptcha Class.
added CaptchaCrypt Class to encode and decode Captcha answers
removed encryption/decryption code as it is moved to CaptchaCrypt class.
Renamed CaptchaFactory class to BaseCaptcha, I no longer intend to use it strictly as Factory model
moved code from CaptchaCrypt to BaseCaptcha
added validation code in MultiCaptcha
Added setOptions function
Added Honeypot type.
Also fixed validate() function
removed padding from encrypted cipher
Merge pull request #1 from sameer-shelavale/WIP-basic-captcha

merging basic version with support for "Recaptcha" and "HoneyPot"