Updates automatically the number of contributors in the README file.

src/doc/README.md-nobuild

@@ -4,7 +4,7 @@
 ### {{ site.forkawesome.tagline }}
 
 [![npm](https://img.shields.io/npm/v/fork-awesome.svg?style=flat&colorB=CB3837)](https://www.npmjs.com/package/fork-awesome)
-[![All Contributors](https://img.shields.io/badge/all_contributors-112-orange.svg?style=flat-square)](CONTRIBUTORS.md)
+[![All Contributors](https://img.shields.io/badge/all_contributors-{{ page.total_contributors }}-orange.svg?style=flat-square)](CONTRIBUTORS.md)
 [![JSDeliver](https://data.jsdelivr.com/v1/package/npm/fork-awesome/badge)](https://www.jsdelivr.com/package/npm/fork-awesome)
 [![CDNJS](https://img.shields.io/cdnjs/v/fork-awesome.svg?style=flat-square)](https://cdnjs.com/libraries/fork-awesome)
 [![Build Status](https://travis-ci.org/ForkAwesome/Fork-Awesome.svg?branch=master)](https://travis-ci.org/ForkAwesome/Fork-Awesome)

src/doc/_plugins/all-contributors-generator.rb

@@ -0,0 +1,17 @@
+##
+# Generate an all-contributors badge with the number of contributors
+
+require "json"
+
+module Jekyll
+  class AllContributors < Generator
+    def generate(site)
+      all_contributors_rc = File.read(File.join(Dir.pwd, '.all-contributorsrc'))
+      all_contributors = JSON.parse(all_contributors_rc)
+      total_contributors = all_contributors['contributors'].length
+
+      readme = site.pages.detect {|page| page.name == 'README.md-nobuild'}
+      readme.data['total_contributors'] = total_contributors
+    end
+  end
+end