Add admin password confirmation on setup

Closes #419

- Introduce a password:confirm question
- Isolate password questions to they can be re-asked
- Verify matching password, re-ask if not

src/install.js

@@ -277,18 +277,32 @@ var async = require('async'),
 					description: 'Administrator email address',
 					pattern: /.+@.+/,
 					required: true
-				}, {
+				}],
+				passwordQuestions = [{
 					name: 'password',
 					description: 'Password',
 					required: true,
 					hidden: true,
 					type: 'string'
+				}, {
+					name: 'password:confirm',
+					description: 'Confirm Password',
+					required: true,
+					hidden: true,
+					type: 'string'
 				}],
 				success = function(err, results) {
 					if (!results) {
 						return callback(new Error('aborted'));
 					}
 
+					// Check if the passwords match
+					if (results['password:confirm'] !== results.password) {
+						winston.warn("Passwords did not match, please try again");
+						// Re-prompt password questions.
+						return retryPassword(results);
+					}
+
 					nconf.set('bcrypt_rounds', 12);
 					User.create(results.username, results.password, results.email, function (err, uid) {
 						if (err) {
@@ -306,8 +320,26 @@ var async = require('async'),
 							}
 						});
 					});
+				},
+				retryPassword = function (originalResults) {
+					// Ask only the password questions
+					prompt.get(passwordQuestions, function (err, results) {
+						if (!results) {
+							return callback(new Error('aborted'));
+						}
+						
+						// Update the original data with newly collected password
+						originalResults.password = results.password;
+						originalResults['password:confirm'] = results['password:confirm'];
+
+						// Send back to success to handle
+						success(err, originalResults);
+					});
 				};
 
+			// Add the password questions
+			questions = questions.concat(passwordQuestions);
+
 			if (!install.values) prompt.get(questions, success);
 			else {
 				var results = {