Fixes ruby-grape#1090

- Add link for documentation published by rubygems in README
- Remove rake task to generate YARD docs

README.md

@@ -117,6 +117,7 @@ The current stable release is [1.0.1](https://github.com/ruby-grape/grape/blob/v
 ## Project Resources
 
 * [Grape Website](http://www.ruby-grape.org)
+* [Documentation](http://www.rubydoc.info/gems/grape)
 * Need help? Try [Grape Google Group](http://groups.google.com/group/ruby-grape) or [Gitter](https://gitter.im/ruby-grape/grape)
 * [Follow us on Twitter](https://twitter.com/grapeframework)
 

Rakefile

@@ -24,47 +24,3 @@ RuboCop::RakeTask.new
 
 task default: [:rubocop, :spec]
 
-begin
-  require 'yard'
-  DOC_FILES = ['lib/**/*.rb', 'README.md'].freeze
-
-  YARD::Rake::YardocTask.new(:doc) do |t|
-    t.files = DOC_FILES
-  end
-
-  namespace :doc do
-    YARD::Rake::YardocTask.new(:pages) do |t|
-      t.files   = DOC_FILES
-      t.options = ['-o', '../grape.doc/docs']
-    end
-
-    namespace :pages do
-      desc 'Check out gh-pages.'
-      task :checkout do
-        dir = File.dirname(__FILE__) + '/../grape.doc'
-        unless Dir.exist?(dir)
-          Dir.mkdir(dir)
-          Dir.chdir(dir) do
-            system('git init')
-            system('git remote add origin git@github.com:ruby-grape/grape.git')
-            system('git pull')
-            system('git checkout gh-pages')
-          end
-        end
-      end
-
-      desc 'Generate and publish YARD docs to GitHub pages.'
-      task publish: ['doc:pages:checkout', 'doc:pages'] do
-        Dir.chdir(File.dirname(__FILE__) + '/../grape.doc') do
-          system('git checkout gh-pages')
-          system('git add .')
-          system('git add -u')
-          system("git commit -m 'Generating docs for version #{Grape::VERSION}.'")
-          system('git push origin gh-pages')
-        end
-      end
-    end
-  end
-rescue LoadError # rubocop:disable Lint/HandleExceptions
-  # ignore
-end