Add some documentation
Remove old architecture image
Split section for parameters for init-script
Add TOC
Remove useless sudo and add comment
Merge pull request #104 from mookjp/issue-99_add_doc

Update document
Support to access build-screen with a different context path

Conflicts:
	docker/pool/build-screen/app/index.html
	docker/pool/handlers/hook.rb
add systemtest for hooks.rb
add system test script
server test: correct to use Rakefile with rspec