Initial data commit

Task/Repeat/Nim/repeat.nim

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+proc example =
+  echo "Example"
+
+# Ordinary procedure
+proc repeatProc(fn: proc, n: int) =
+  for x in 0..<n:
+    fn()
+
+repeatProc(example, 4)
+
+# Template (code substitution), simplest form of metaprogramming
+# that Nim has
+template repeatTmpl(n: int, body: untyped): untyped =
+  for x in 0..<n:
+    body
+
+# This gets rewritten into a for loop
+repeatTmpl 4:
+  example()
+
+import std/macros
+# A macro which takes some code block and returns code
+# with that code block repeated n times. Macros run at
+# compile-time
+macro repeatMacro(n: static[int], body: untyped): untyped =
+  result = newStmtList()
+
+  for x in 0..<n:
+    result.add body
+
+# This gets rewritten into 4 calls to example()
+# at compile-time
+repeatMacro 4:
+  example()