Update readme

README.md

@@ -1,23 +1,23 @@
-jekyll-jalali
+jekyll-jalali [![Gem Version](https://badge.fury.io/rb/jekyll-jalali.svg)](https://badge.fury.io/rb/jekyll-jalali)
 ============
 
 This plugin adds a new filter to Jekyll called `jdate`. Using this filter the given dates will be converted to Jalali which is being used in Iran and Afghanistan. For more information see [Iranian Calendars Entry](http://en.wikipedia.org/wiki/Iranian_calendars) in Wikipedia.
 
 
-# Requirements
-This plugin uses `jalalidate` gem in background, therefore the following section should be added to `_config.yml`:
-```
-gems:
-  - jalalidate
-```
-
-see [https://github.com/aziz/jalalidate](https://github.com/aziz/jalalidate).
-
 # Installation
 
-Simply, put the ``jdate.rb`` into ``_plugins`` directory on your site's root.
+Append `gem jekyll-jalali` to the `plugins` vector (formerly know as _gems_) of your website's __config.yml_ file. You can also put the _jekyll-jalali.rb_ file inside _plugins_ directory of your website. You can install it from Rubygems too:
+
+```gem install jekyll-jalali```
 
 # Usage
-```{{ page.date | jdate: "%A %d %b %Y"}}```
+Use it as a _Liquid_ filter inside any Jekyll template:
+`{{ page.date | jdate: "%A %d %b %Y"}}`
 
 *jdate* accepts valid formatting parameters according to *jalalidate* Ruby gem.
+
+# Credits
+This plugin uses [`jalalidate`]([https://github.com/aziz/jalalidate](https://github.com/aziz/jalalidate) gem for date conversion.
+
+# License
+MIT