Adds Scala Play framework API docs

Specifically for Scala API 2.4, 2.5, and 2.6

assets/stylesheets/application.css.scss

@@ -75,6 +75,7 @@
         'pages/phaser',
         'pages/php',
         'pages/phpunit',
+        'pages/play',
         'pages/postgres',
         'pages/pug',
         'pages/ramda',

assets/stylesheets/pages/_play.scss

@@ -0,0 +1,6 @@
+/**
+ * Play uses the same styles as Scala (since it uses Scaladoc)
+ */
+._play {
+  @extend ._scala;
+}

lib/docs/scrapers/play.rb

@@ -0,0 +1,39 @@
+module Docs
+  class Play < FileScraper
+    include FixInternalUrlsBehavior
+
+    self.name = 'play'
+    self.type = 'play'
+
+    self.links = {
+      home: 'https://playframework.com',
+      code: 'https://github.com/playframework/playframework'
+    }
+    self.root_path = 'package.html'
+
+    options[:attribution] = <<-HTML
+      <p>Copyright (C) 2009-2017 Lightbend Inc. (<a href="https://www.lightbend.com">https://www.lightbend.com</a>).</p>
+      <p>Licensed under the Apache License, Version 2.0 (the "License"); you may not use this project except in compliance with the License. You may obtain a copy of the License at <a href="http://www.apache.org/licenses/LICENSE-2.0">http://www.apache.org/licenses/LICENSE-2.0</a>.</p>
+    HTML
+    options[:skip_patterns] = [/^index.html/, /index\/index-/]
+    html_filters.push 'scala/entries', 'scala/clean_html'
+
+    version 'Scala API 2.4' do
+      self.release = '2.4.11'
+      self.base_url = 'https://playframework.com/documentation/2.4.11/api/scala/'
+      self.dir = '/Users/Thibaut/DevDocs/Docs/Play24/docs/content/api/scala' # download from http://central.maven.org/maven2/com/typesafe/play/play-docs_2.11/2.4.11/play-docs_2.11-2.4.11.jar
+    end
+
+    version 'Scala API 2.5' do
+      self.release = '2.5.18'
+      self.base_url = 'https://playframework.com/documentation/2.5.18/api/scala/'
+      self.dir = '/Users/Thibaut/DevDocs/Docs/Play25/docs/content/api/scala' # download from http://central.maven.org/maven2/com/typesafe/play/play-docs_2.11/2.5.18/play-docs_2.11-2.5.18.jar
+    end
+
+    version 'Scala API 2.6' do
+      self.release = '2.6.6'
+      self.base_url = 'https://playframework.com/documentation/2.6.6/api/scala/'
+      self.dir = '/Users/Thibaut/DevDocs/Docs/Play26/docs/content/api/scala' # Download from http://central.maven.org/maven2/com/typesafe/play/play-docs_2.11/2.6.6/play-docs_2.11-2.6.6.jar
+    end
+  end
+end