Added .process()

Process files through plugins without writing out files

Author: woodyrew

lib/index.js

@@ -198,6 +198,18 @@ Metalsmith.prototype.build = unyield(function*(){
   return files;
 });
 
+/**
+ * Process files through plugins without writing out files.
+ *
+ * @return {Object}
+ */
+
+Metalsmith.prototype.process = unyield(function*(){
+  var files = yield this.read();
+  files = yield this.run(files);
+  return files;
+});
+
 /**
  * Run a set of `files` through the plugins stack.
  *