Convert to ESLint for code quality and formatting

Author: eriwen

.eslintrc.yml

@@ -0,0 +1,25 @@
+env:
+  browser: true
+  commonjs: true
+  node: true
+extends: 'eslint:recommended'
+globals:
+  define: false
+  describe: false
+  expect: false
+  it: false
+parserOptions:
+  ecmaVersion: 5
+rules:
+  indent:
+    - error
+    - 4
+  linebreak-style:
+    - error
+    - unix
+  quotes:
+    - error
+    - single
+  semi:
+    - error
+    - always

.jscsrc

@@ -1,7 +1,6 @@
 var coveralls = require('gulp-coveralls');
 var del = require('del');
 var gulp = require('gulp');
-var jshint = require('gulp-jshint');
 var karma = require('karma');
 var rename = require('gulp-rename');
 var runSequence = require('run-sequence');
@@ -11,13 +10,6 @@ var uglify = require('gulp-uglify');
 var sources = 'stackframe.js';
 var minified = sources.replace('.js', '.min.js');
 
-gulp.task('lint', function() {
-    return gulp.src(sources)
-        .pipe(jshint())
-        .pipe(jshint.reporter('default'))
-        .pipe(jshint.reporter('fail'));
-});
-
 gulp.task('test', function(done) {
     new karma.Server({
         configFile: __dirname + '/karma.conf.js',