Added guard-ronn (to build manual automatically).

Gemfile

@@ -4,6 +4,10 @@ gemspec
 
 gem 'rake'
 
+group :guard do
+  gem 'guard-ronn'
+end
+
 require 'rbconfig'
 
 if RbConfig::CONFIG['target_os'] =~ /darwin/i

Guardfile

@@ -16,4 +16,8 @@ end
 #
 # group "exceptional" do
 #   guard :breaking
-# end
+# end
+
+guard 'ronn' do
+  watch(%r{^man/.+\.m(ark)?d(own)?$})
+end