Add lint:fix command to gulp and npm-scripts

gulpfile.js

@@ -161,6 +161,13 @@ gulp.task('lint', function () {
     .pipe(eslint.failAfterError())
 });
 
+gulp.task('lint:fix', function () {
+  return gulp.src(['app/**/*.js', 'ui/**/*.js', 'mascara/src/*.js', 'mascara/server/*.js', '!node_modules/**', '!dist/firefox/**', '!docs/**', '!app/scripts/chromereload.js', '!mascara/test/jquery-3.1.0.min.js'])
+    .pipe(eslint(Object.assign(fs.readFileSync(path.join(__dirname, '.eslintrc')), {fix: true})))
+    .pipe(eslint.format())
+    .pipe(eslint.failAfterError())
+});
+
 /*
 gulp.task('default', ['lint'], function () {
     // This will only run if the lint task is successful...

package.json

@@ -29,6 +29,7 @@
     "test:mascara:build:background": "browserify mascara/src/background.js -o dist/mascara/background.js",
     "test:mascara:build:tests": "browserify test/integration/lib/first-time.js -o dist/mascara/tests.js",
     "lint": "gulp lint",
+    "lint:fix": "gulp lint:fix",
     "disc": "gulp disc --debug",
     "announce": "node development/announcer.js",
     "generateNotice": "node notices/notice-generator.js",