updated sys and created publi

publi/node_modules/isexe/access.js

@@ -0,0 +1,15 @@
+module.exports = isexe
+isexe.sync = sync
+
+var fs = require('fs')
+
+function isexe (path, _, cb) {
+  fs.access(path, fs.X_OK, function (er) {
+    cb(er, !er)
+  })
+}
+
+function sync (path, _) {
+  fs.accessSync(path, fs.X_OK)
+  return true
+}