Merge pull request #16 from joostdekeijzer/deleteMapExtensions-issue-10

deleteMapExtensions option defaults to false

README.md

@@ -16,7 +16,7 @@ revDel({
 	oldManifest: 'rev-manifest.json',
 	newManifest: { /* a manifest */ },
 	suppress: true, 
-	deleteMapExtensions: true
+	deleteMapExtensions: false
 }, function (err, filesDeleted) {
 	// ...
 });
@@ -31,6 +31,8 @@ more efficient to pass it in as an object.
 doesn't exist. You don't normally want to change: usually, the first time you
 run your revisioning script, the manifest doesn't exist yet.
 
+`deleteMapExtensions`, when set to true, will try and find any ".map" files generated by [gulp-sourcemaps](//github.com/gulp-sourcemaps/gulp-sourcemaps) belonging to changed files in `oldManifest` and delete those too.
+
 ### With Gulp
 
 rev-del works great with Gulp and gulp-rev. You need to specify either `dest`