Initial data commit

Task/Call-a-function/Dyalect/call-a-function-12.dyalect

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+//Using a closure:
+func apply(fun, fst) { snd => fun(fst, snd) }
+
+//Usage:
+func sum(x, y) { x + y }
+
+var sum2 = apply(sum, 2)
+var x = sum2(3) //x is 5
+
+//By second argument
+func flip(fun) { (y, x) => fun(x, y) }
+func sub(x, y) { x - y }
+
+var sub3 = apply(flip(sub), 3)
+x = sub3(9) //x is 6