title: gulp-babel plugin doesn't work
body: <p>I try to use babel with gulp. But I faced error that can't resolve.</p>
  
  <p>My gulp task looks like 
  `</p>
  
  <pre><code>var gulp = require('gulp'),
      concat = require('gulp-concat'),
      babel = require("gulp-babel");
  
  gulp.task('default', function() {
  
      gulp.src(cssSrc)
          .pipe(concat('main.css'))
          .pipe(gulp.dest('build'));
  
      gulp.src(jsSrc)
          .pipe(babel())
          .pipe(concat('app.js'))
          .pipe(gulp.dest('build'));
  
      gulp.watch(cssSrc,['css-task']);
      gulp.watch(jsSrc,['js-task']);
  
  });
  </code></pre>
  
  <p>`</p>
  
  <p>jsSrc - array of pathes to js files</p>
  
  <p>.babelrc looks so</p>
  
  <pre><code>{
  "presets": ["es2015"]
  }
  </code></pre>
  
  <p>When I run gulp I see this error</p>
  
  <pre><code>events.js:141
        throw er; // Unhandled 'error' event
        ^
  ReferenceError: [BABEL] C:\workspace\projects\test\test-client\app.js: Unknown option: C:\workspace\projects\test\test-client\.babelrc.presets
      at Logger.error (C:\workspace\projects\test\test-client\node_modules\gulp-babel\node_modules\babel-core\lib\transformation\file\logger.js:58:11)
      at OptionManager.mergeOptions (C:\workspace\projects\test\test-client\node_modules\gulp-babel\node_modules\babel-core\lib\transformation\file\options\option-manager.js:126:29)
      at OptionManager.addConfig (C:\workspace\projects\test\test-client\node_modules\gulp-babel\node_modules\babel-core\lib\transformation\file\options\option-manager.js:107:10)
      at OptionManager.findConfigs (C:\workspace\projects\test\test-client\node_modules\gulp-babel\node_modules\babel-core\lib\transformation\file\options\option-manager.js:168:35)
      at OptionManager.init (C:\workspace\projects\test\test-client\node_modules\gulp-babel\node_modules\babel-core\lib\transformation\file\options\option-manager.js:229:12)
      at File.initOptions (C:\workspace\projects\test\test-client\node_modules\gulp-babel\node_modules\babel-core\lib\transformation\file\index.js:147:75)
      at new File (C:\workspace\projects\test\test-client\node_modules\gulp-babel\node_modules\babel-core\lib\transformation\file\index.js:137:22)
      at Pipeline.transform (C:\workspace\projects\test\test-client\node_modules\gulp-babel\node_modules\babel-core\lib\transformation\pipeline.js:164:16)
      at DestroyableTransform._transform (C:\workspace\projects\test\test-client\node_modules\gulp-babel\index.js:30:20)
      at DestroyableTransform.Transform._read (C:\workspace\projects\test\test-client\node_modules\gulp-babel\node_modules\through2\node_modules\readable-stream\lib\_stream_transform.js:172:10)
  </code></pre>
  
  <p>app.js- the first file in jsSrc array</p>
  
  <p>What could be wrong ?</p>