Update README.md, and version

Author: Mehdy Dara

README.md

@@ -42,6 +42,7 @@ gulp.task('default', function () {
 gulp.task('default', function () {
     return gulp.src('src/css/input.css')
         .pipe(cssBase64({
+            verbose: true
             baseDir: "../../images",
             maxWeightResource: 100,
             extensionsAllowed: ['.gif', '.jpg']
@@ -60,10 +61,33 @@ Default value: `false`
 Note: Writes in stdout for more infos on process. (Resource ignored, fetch remote resource, etc)
 
 #### options.preProcess
-Type: `Function(buffer, mimeType, callback)`
+Type: `Function(vinylFile, callback)`
 
 Default value: ``
 
+Note: Vinyl is a virtual file format. See [description](https://github.com/wearefractal/vinyl#file)
+
+Example:
+```js
+// Apply a rotation on each PNG image with NPM library http://aheckmann.github.io/gm/
+var gm = require('gm').subClass({
+    imageMagick: true
+});
+[...]
+        .pipe(cssBase64({
+            preProcess : function(vinylFile, callback) {
+                if ('image/png' === mime.lookup(vinylFile.path)) {
+                    gm(vinylFile.path).rotate('green', 180).toBuffer(function (err, buffer) {
+                        vinylFile.contents = buffer;
+                        return callback(vinylFile);
+                    })
+                }
+            }
+        }))
+[...]
+
+```
+
 #### options.baseDir
 Type: `String`
 

package.json

@@ -1,7 +1,7 @@
 {
   "name": "gulp-css-base64",
   "description": "Gulp's task for transform all resources found in a CSS into base64-encoded data URI strings",
-  "version": "1.2.2",
+  "version": "1.2.3",
   "homepage": "http://github.com/zckrs/gulp-css-base64",
   "repository": {
     "type": "git",

src/index.js

@@ -63,7 +63,7 @@ function gulpCssBase64(opts) {
                     }
 
                     if (opts.extensionsAllowed.length !== 0 && opts.extensionsAllowed.indexOf(path.extname(result[1])) == -1) {
-                        log("Ignore " + chalk.yellow(result[1]) + ", extension not allowed " + chalk.yellow(path.extname(result[1])), opts.verbose);
+                        log("Ignores " + chalk.yellow(result[1]) + ", extension not allowed " + chalk.yellow(path.extname(result[1])), opts.verbose);
                         callback();
                         return;
                     }
@@ -72,7 +72,7 @@ function gulpCssBase64(opts) {
                         if (undefined !== fileRes) {
 
                             if (fileRes.contents.length > opts.maxWeightResource) {
-                                log("Ignore " + chalk.yellow(result[1]) + ", file is too big " + chalk.yellow(fileRes.contents.length + " bytes"), opts.verbose);
+                                log("Ignores " + chalk.yellow(result[1]) + ", file is too big " + chalk.yellow(fileRes.contents.length + " bytes"), opts.verbose);
                                 callback();
                                 return;
                             }
@@ -113,13 +113,13 @@ function encodeResource(img, file, opts, doneCallback) {
     var fileRes = new gutil.File();
 
     if (/^data:/.test(img)) {
-        log("Ignore " + chalk.yellow(img.substring(0, 30) + '...') + ", already encoded", opts.verbose);
+        log("Ignores " + chalk.yellow(img.substring(0, 30) + '...') + ", already encoded", opts.verbose);
         doneCallback();
         return;
     }
 
     if (img[0] === '#') {
-        log("Ignore " + chalk.yellow(img.substring(0, 30) + '...') + ", SVG mask", opts.verbose);
+        log("Ignores " + chalk.yellow(img.substring(0, 30) + '...') + ", SVG mask", opts.verbose);
         doneCallback();
         return;
     }