Add tests for examples from Nim in Action.

tests/niminaction/Chapter6/WikipediaStats/naive.nim

@@ -0,0 +1,29 @@
+# See this page for info about the format https://wikitech.wikimedia.org/wiki/Analytics/Data/Pagecounts-all-sites
+import tables, parseutils, strutils
+
+const filename = "pagecounts-20150101-050000"
+
+proc parse(filename: string): tuple[projectName, pageTitle: string,
+    requests, contentSize: int] =
+  # Each line looks like: en Main_Page 242332 4737756101
+  var file = open(filename)
+  for line in file.lines:
+    var i = 0
+    var projectName = ""
+    i.inc parseUntil(line, projectName, Whitespace, i)
+    i.inc
+    var pageTitle = ""
+    i.inc parseUntil(line, pageTitle, Whitespace, i)
+    i.inc
+    var requests = 0
+    i.inc parseInt(line, requests, i)
+    i.inc
+    var contentSize = 0
+    i.inc parseInt(line, contentSize, i)
+    if requests > result[2] and projectName == "en":
+      result = (projectName, pageTitle, requests, contentSize)
+
+  file.close()
+
+when isMainModule:
+  echo parse(filename)