Create cognate.scroll (#545)

resolves issue #534

concepts/cognate.scroll

@@ -0,0 +1,36 @@
+import ../code/conceptPage.scroll
+
+id cognate
+name Cognate
+appeared 2020
+creators Finn Barber
+tags pl
+description A human readable quasi-concatenative programming language
+paper https://cognate-lang.github.io/learn.html
+
+compliesTo C
+githubRepo https://github.com/cognate-lang/cognate 
+
+conceptDescription Cognate is a small, dynamic, concatenative language for functional programming. Cognate aims to express complex programs in a simple and readable way through its unique syntax, which emphasises embedding comments into statements. This makes programs very readable and helps a programmer better express their intentions.
+
+website https://cognate-lang.github.io/
+
+example
+ ~~ Prime numbers in Cognate
+
+ Def Factor (Zero? Modulo Swap);
+
+ Def Primes (
+    Let U is upper bound;
+    initially List ();
+    For Range 2 to U (
+       Let P is potential prime;
+       Let Found be list of found primes;
+       Let To-check be Take-while (<= Sqrt P) Found;
+       When All (Not Factor of P) To-check (
+          Append P
+       ) to Found
+    )
+ );
+
+ Print Primes up to 1000;