Add tasks for all the new languages

Task/SEDOLs/Nim/sedols.nim

@@ -0,0 +1,28 @@
+import strutils
+
+proc c2v(c): int =
+  assert c notin "AEIOU"
+  let a = ord(c)
+  if a < 65: a - 48
+  else: a - 55
+
+const weight = [1,3,1,7,3,9]
+
+proc checksum(sedol): string =
+  var tmp = 0
+  for i,s in sedol:
+    tmp += c2v(s) * weight[i]
+  result = $((10 - (tmp mod 10)) mod 10)
+
+for sedol in """710889
+B0YBKJ
+406566
+B0YBLH
+228276
+B0YBKL
+557910
+B0YBKR
+585284
+B0YBKT
+B00030""".splitLines():
+  echo sedol, checksum(sedol)