Add support for document generation by RDoc

Author: kou

.gitignore

@@ -1,9 +1,7 @@
 /.bundle/
-/.yardoc
 /Gemfile.lock
-/_yardoc/
 /coverage/
-/doc/
+/html/
 /pkg/
 /spec/reports/
 /tmp/

Rakefile

@@ -1,4 +1,6 @@
 require "rbconfig"
+require "rdoc/task"
+
 require "bundler/gem_tasks"
 
 desc "Run test"
@@ -8,6 +10,17 @@ end
 
 task :default => :test
 
+RDoc::Task.new do |rdoc|
+  rdoc.main = "README.md"
+  files = [
+    "LICENSE.txt",
+    "NEWS.md",
+    "README.md",
+    "lib/**/*.rb",
+  ]
+  rdoc.rdoc_files.include(*files)
+end
+
 benchmark_tasks = []
 namespace :benchmark do
   Dir.glob("benchmark/*.yaml") do |yaml|