Modified the readme

Readme.md

@@ -1,7 +1,15 @@
-Need to create post listing by authors? This plugin can help you to achieve that.
+#What does it do
+
+* Create a listing page for "posts bys author".
+* Adds a link to the author for listing
 
 # How to use
+* Clone the repository
 * Copy the author_generator.rb file to the plugins directory
 * Copy the files under _includes to the _includes directory
 * And copy the files under _layouts directory to the _layouts directory
+* To customize the look and feel, change the author_index.html in the _layouts directory.
+
+
+