Template classes: LessThan, MoreThan & WithinRange

		USAGE: LessThan<double> less_than_50 {50}; MoreThan<double> more_than_50 {50}; 
			WithinRange<double> is_valid_percent {-100 , 100};

			bool pa = is_valid_percent(50); bool pb = is_valid_percent(0.35); bool pc 
			= is_valid_percent(101); bool la = less_than_50(50); bool lb = 
			less_than_50(0.35); bool lc = less_than_50(101); bool ma = 
			more_than_50(50); bool mb = more_than_50(0.35); bool mc = 
			more_than_50(101);

email/
	checkEmail.py

		USAGE: python3 checkEmail.py <email> [<email2> <email3> ..... <emailN>]

			Output:

				One argument:

					exit value 0 if email address is ok.

					exit value 1 if email address is not ok.

				two or more arguments:

					list of OK or NOK

wordpress/
	wordpress_email_checker.php
	wordpress_email_checker.patch

		USAGE: 

			cd <WP_ROOT>/wp-include
			patch -p0 < wordpress_email_checker.patch

			cp wordpress_email_checker.php <WP_ROOT>/wp-include