Added nightwatch starrynight scaffold folder

LesionTracker/tests/nightwatch/commands/api/entry/signIn.js

@@ -0,0 +1,14 @@
+exports.command = function(username, password) {
+
+  this
+    .waitForElementVisible('#entrySignIn', 1000)
+      .verify.elementPresent("#signInPageEmailInput")
+      .verify.elementPresent("#signInPagePasswordInput")
+
+      .setValue("#signInPageEmailInput", username)
+      .setValue("#signInPagePasswordInput", password)
+
+    .click("#signInToAppButton").pause(1000)
+
+  return this; // allows the command to be chained.
+};