Added some new Laravel Validators

Added few Validators that are like Laravel for reusability. The in and not_in Validators are the most interesting. The list includes:

• accepted: useful on "Terms of service"
• between: auto-detect type then use between_len or between_num
• max: auto-detect type then use max_len or max_num
• min: auto-detect type then use min_len or min_num
• size: auto-detect type then use exact_len or exact_num
• ip: new alias
• digits: similar to exact_len but only for digits
• digits_between: similar to between_len but only for digits
• in / in_list: useful for accepting a word from a given list of values
• not_in / not_in_list: useful for accepting a word outside a given list of values
• different: make sure current input is different from another input
• same: new alias to match