add starting version for nim

wip/nim/hello_world/hello_world.nim

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+echo "Hello world"

wip/nim/hello_world/makefile

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+build: hello_world.nim
+	nim c hello_world.nim

wip/nim/samples.nim

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+import std/random
+import std/math
+# randomize()
+
+proc pow2(x:float, y:int): float = 
+  return pow(x, float(y))
+
+proc sine(x: float): float = 
+  let n = 100
+  var result = 0.0
+  for i in 0..n:
+    let k = 2*n + 1
+    let taylor = pow2(x, k)/ float(k)
+    result = result + taylor
+  return result
+
+proc log(x: float): float = 
+  var y = x - 1 
+  var result = 0.0
+  let n = 1000
+  for i in 1..n:
+    let taylor = pow2(-1, n+1) * pow2(y, n) / float(n)
+    let n = 1000
+    result = result + taylor
+  return result
+
+proc normal(): float = 
+  let u1 = rand(1.0)
+  let u2 = rand(1.0)
+  let z = 1
+  # see https://en.wikipedia.org/wiki/Box%E2%80%93Muller_transform#Basic_form
+
+
+echo log(1.0)