Setting up Bowersync, Gulp and Angularjs project

I am having a problem with setting up bowerSync, Gulp and angularJs.

I have set up my local development server with bowerSync and now I am trying to add angularJs to the project. But every time I run the development server my browser freezes and this problem occurs:
In Chrome it shows error in console and displays tried to load angular more than once (It starts to loop).

Here is my gulpfile:

    var gulp = require('gulp'),
    sass = require('gulp-sass'),
    bs = require('browser-sync').create(),
    concat = require('gulp-concat'),
    clean = require('gulp-clean'),
    merge = require('merge-stream'),
    install = require('gulp-install'),
    gutil = require('gulp-util'),
    wait = require('gulp-wait'),
    help = require('gulp-showhelp'),
    source = require('vinyl-source-stream'),
    browserify = require('browserify');

gulp.task('browserify', function(){
    return browserify('app/js/app.js')
        .bundle()
        .pipe(source('main.js'))
        .pipe(gulp.dest('js'));
})



//Installs bower and npm components for the project

gulp.task('install', function(){
    return gulp.src(['bower.json', 'package.json'])
            .pipe(install());
}).help="Installs bower and npm dependencies";

//Cleans dist and .tmp folders from the previous files

gulp.task('clean', function(){
    var cleanTmp = gulp.src('dist')
                .pipe(clean({read:false}));
    var cleanDist = gulp.src('.tmp')
                .pipe(clean({read:false}));
    return merge(cleanDist, cleanTmp)
            .pipe(wait(1500));

}).help="Cleans .tmp and dist folder from previous compiled files";

//Launches the development server

gulp.task('browser-sync', ['sass'], function(){
    bs.init(['app/index.html', 'app/views/**/*.html', 'app/css/*.css', 'app/js/**/*.js'],{
        server: {
            baseDir: "./",
            index: "app/index.html",
            routes: {
                "/bower_components": "bower_components",    
                "/css": "app/css",
                "/images": "app/images",
                "/app": "app" 

                }
            },
        ghostMode: {
                links: false
            }
    });
}).help="Sets up the local development environment";

//Compiles css files

gulp.task('sass', function(){
    return gulp.src('app/scss/*.scss')
        .pipe(sass())
        .pipe(concat('main.css'))
        .pipe(gulp.dest('app/css'))
        .pipe(bs.reload({stream: true}));
}).help="Compiles Scss to Css files";

gulp.task('js', function(){
    return gulp.src('app/js/**/*.js')
        .pipe(gulp.dest('.tmp/js'))
        .pipe(bs.reload({stream:true}));
});

//Watches the changes in the files and autorefreshes browser

gulp.task('watch', ['browser-sync'], function(){
    gulp.watch("app/scss/*.scss", ['sass']);
    gulp.watch("app/**/*.html").on('change', bs.reload);
    gulp.watch('app/js/**/*.js', ['browserify']);
}).help="Watches changes in HTML, JS and SCSS files and compiles them";

//Builds the files to .tmp and dist folder

gulp.task('build', ['sass', 'clean'], function(){
    var base = 'app/**/*';
    var pathsToBuild = ['.tmp', 'dist'];
    var tmpFolder = gulp.src(base)
                    .pipe(gulp.dest(pathsToBuild[0]));
    var distFolder = gulp.src(base)
                    .pipe(gulp.dest(pathsToBuild[1]));
    return merge(tmpFolder, distFolder);
}).help="Builds project to the dist folder";

//Environment for developing the front-end

gulp.task('dev', ['browser-sync', 'watch']).help="Sets up the environment for the local development";

//Displays gulp tasks

gulp.task('default', function(){
    help.show();
}); 

and here is my app.js file:

'use strict';

var app = angular.module('brainTextApp', ['ngRoute']);

app.config(function($routeProvider, $httpProvider){
    $httpProvider.defaults.headers.common['X-Requested-With'] = 'XMLHttpRequest';
    $routeProvider
        .when('/', {
            templateUrl: "app/index.html"
        })
        .when('/login', {
            templateUrl: "app/login.html"
        })
        .when('/dashboard', {
            templateUrl: "dashboard.htm"
        })
});

app.controller('loginController', function($scope, $location){
    $scope.submit = function(){
        var uname = $scope.username;
        var pw = $scope.password;

        if($scope.username == 'admin' && $scope.password == 'admin'){
            $location.path('/dashboard');
        }
    }
});

I think it is a very silly mistake somewhere in there, but I am not abel to locate it. I have searched all over the internet and found no solutions for this problem
Hope you guys can help me somehow :)