Updates to make it work with writev

When writing to stdout, and then calling process.exit right after, the
write never happens.

Probably a bug in node.

cli.js

@@ -1,5 +1,5 @@
 #!/usr/bin/env node
-
+;(function () { // wrapper in case we're in module_context mode
 // don't assume that npm is installed in any particular spot, since this
 // might conceivably be a bootstrap attempt.
 var log = require("./lib/utils/log")
@@ -51,8 +51,8 @@ npm.argv = arglist
 var vindex = arglist.indexOf("-v")
   , printVersion = vindex !== -1 || conf.version
 if (printVersion) {
-  sys.puts(npm.version)
-  process.exit(0)
+  console.log(npm.version)
+  return
 } else log("npm@"+npm.version, "using")
 log("node@"+process.version, "using")
 
@@ -81,3 +81,4 @@ npm.load(conf, function (er) {
   if (er) return errorHandler(er)
   npm.commands[command](arglist, errorHandler)
 })
+})()