Merge branch 'master' into mongodb

Author: Vitalii Samolovskikh

README.md

@@ -1,4 +1,21 @@
 grails-asynchronous-mail-sample
 ===============================
 
-The sample application for the plugin Grails Asynchronous Mail
+The sample application for the Grails Asynchronous Mail plugin.
+
+Description
+-----------
+
+The application shows how to use the Grails Asynchronous Mail plugin. It has one form for send email message and controller and views for see asynchronous messages in the DB.
+
+I recommend to use [FakeSMTP](http://nilhcem.github.io/FakeSMTP/) as SMTP server for this example.
+
+Branches
+--------
+
+The applications in all branches has equals functionality but uses different features of the plugin. There are 4 branches.
+
+* `master` demonstrates usual usage of the plugin. It uses the [hibernate](http://www.grails.org/plugin/hibernate) plugin as GORM persistence provider.
+* `hibernate4` uses the [hibernate4](http://www.grails.org/plugin/hibernate4) plugin as GORM persistence provider.
+* `mongodb` uses the [mongodb](http://www.grails.org/plugin/mongodb) plugin as GORM persistence provider.
+* `cluster` contains the Quartz configuration to use it in a cluster environment.