title: Use wiredep to inject custom CSS
body: <p>I need to inject custom CSS files everytime they are created after being compiled by gulp-less. So I tried to use wiredep with custom configurations, but without success.
  I changed the tag from 'bower:css' to 'custom:css', specifically to my custom task. The bower:css for default wiredep injection is still there. But after run <code>myinjection</code> task nothing is injected even running the task without errors.
  Another weird thing, when I run my task, the files injected by wiredep (the default) disappear.
  What I'm missing?</p>
  
  <p>Basicaly my files structure is like this:</p>
  
  <pre><code>|---app 
      |---styles
          |---***
          *.css
      *.html
      .custom.json
  </code></pre>
  
  <p>I'm not sure if I really need a file similar to bower.json, but I made may own custom.json</p>
  
  <pre><code>{
    "name": "custom",
    "version": "0.0.1",
    "main": [
      "app/styles/**/*.css",
      "app/scripts/**/*.js //pretend to inject custom js later
    ]
  }
  </code></pre>
  
  <p>The task in gulpfile.js is like this:</p>
  
  <pre><code>    gulp.task('myinject', function () {
      var myinject = require('wiredep').stream;
  
      var combined = Combine (
          gulp.src('app/*.html'),
          myinject({
              directory: 'app',
              bowerJson: require('./custom.json'),
              dependencies: false,
              html: 
              {
                block: /(([ \t]*)&lt;!--\s*custom:*(\S*)\s*--&gt;)(\n|\r|.)*?(&lt;!--\s*endcustom\s*--&gt;)/gi,
                detect: {
                  js: /&lt;script.*src=['"](.+)['"]&gt;/gi,
                  css: /&lt;link.*href=['"](.+)['"]/gi
                },
                replace: {
                  js: '&lt;script src="{{filePath}}"&gt;&lt;/script&gt;',
                  css: '&lt;link rel="stylesheet" href="{{filePath}}" /&gt;'
                }
              }
          }),
          gulp.dest('app')
      );
      combined.on('error', function(err) {
          console.warn(err.message);
      });
  
      return combined;
  });
  </code></pre>
  
  <p>Thanks in advance</p>