doc: update docs and sample files

doc/sample/Simple.im

@@ -1,36 +1,9 @@
-y = -1 + 2 * 3 / 4 * 5 - 6 + 7 multiply-by:2.
-z = w = 2 + 3 multiply-by:2.
-x = (((1 + 2 * 3) multiply-by:3) add: 5) + 2.
-x = ((1 + 2 * 3) multiply-by:3).
-p = 5 multiply(by:3, add:(2 + 1)).
-q = 10 squared squared.
+package net.doorstuck.test
 
-p1
-    set-age:2 squared squared + 4 squared multiply(by:2, add:4 + 1 * 3)
-    in:"mon" + "ths".
+use std.io
 
-m = xz multiply(by:3 add:2) squared.
+y = 32 * 64.
+z = 64 / 4.
+x = y + z.
 
-m = xz multiply(by:3 add:2); squared.
-
-x = Ordered-Collection new
-	add: 2;
-	add: 4;
-	add: 6;
-	yourself.
-
-age = Person new(name:"John Doe", age:34)
-    set-age:144 in-unit:"months";
-    age-in-months.
-
-x = 5.
-q = 10 if x > 2 else 20.
-q = if x > 2 then 10 else 20 end.
-
-cout put:5 multiply(by:5, add:2) if x > 2.
-
-if x > 2 then
-	cout put:"Greater"
-else
-	cout put:"Less"
-end
+cout put:'Answer: {x}'