Lots of build system and docs improvements, including a manpage.

- Build binaries for multiple platforms
 - Make a manpage out of the manual (see #19)
 - Extract more tests from the documentation
 - Fix a few documentation bugs uncovered by above.

docs/Rakefile

@@ -2,6 +2,8 @@ require 'bonsai'
 require 'liquid'
 require 'maruku'
 require 'json'
+require 'ronn'
+require 'tempfile'
 
 module ExtraFilters
   def markdownify(input)
@@ -59,3 +61,43 @@ task :build do
   Bonsai.root_dir = Dir.pwd
   Bonsai::Exporter.publish!
 end
+
+def load_manual
+  YAML::ENGINE.yamler = 'syck'
+  YAML::load(File.open("content/3.manual/manual.yml"))
+end
+
+task :manpage do
+  Tempfile.open "manpage" do |f|
+    manual = load_manual
+    f.puts manual['manpage_intro']
+    f.puts manual['body']
+    manual['sections'].each do |section|
+      
+      f.puts "## #{section['title'].upcase}\n"
+      f.puts section['body']
+      f.puts ""
+      (section['entries'] || []).each do |entry|
+        f.puts "### #{entry['title']}\n"
+        f.puts entry['body']
+        f.puts ""
+      end
+      f.puts ""
+    end
+    f.close
+    puts Ronn::Document.new(f.path).convert('roff').gsub(/<\/?code>/,"")
+  end  
+end
+
+task :mantests do
+  load_manual['sections'].each do |section|
+    (section['entries'] || []).each do |entry|
+      (entry['examples'] || []).each do |example|
+        puts example['program'].gsub("\n", " ")
+        puts example['input']
+        example['output'].each do |s| puts s end
+        puts
+      end
+    end
+  end
+end