Rename types: {Response/Request} String -> Http{Response/Request}

Rename types: {Response/Request} String -> Http{Response/Request}

Affected files:
Framework/Forms/Types.hs
Framework/Forms/Validation.hs
Framework/Http/Cookies.hs
Framework/Http/HTTPServer.hs
Framework/Http/Middlewares.hs
Framework/Http/Response.hs
Framework/Http/Sessions.hs
Framework/Logger.hs
Framework/Pager.hs
Framework/TEngine/TemplateUtil.hs
Framework/Types.hs
Framework/Urls.hs
Framework/Wrapper.hs