Cleanup. Enhace error handling.

Cleanup. Enhace error handling.

Affected files:
Blog/Blog.hs
Blog/Models.hs
Blog/Settings.hs
Blog/templates/404.html
Framework/API.hs
Framework/Cache/Cache.hs
Framework/Controller.hs
Framework/Forms/HTML.hs
Framework/Forms/Types.hs
Framework/Forms/Validation.hs
Framework/Forms/Validators.hs
Framework/Http/Cookies.hs
Framework/Http/HTTPServer.hs
Framework/Http/Httpd.hs
Framework/Http/Middlewares.hs
Framework/Http/PostParser.hs
Framework/Http/Response.hs
Framework/Http/Sessions.hs
Framework/Http/Static.hs
Framework/Logger.hs
Framework/Makefile
Framework/ORM/SQL.hs
Framework/ORM/Types.hs
Framework/Pager.hs
Framework/Storage.hs
Framework/TEngine/TemplateUtil.hs
Framework/TGenerator/TemplateGen.hs
Framework/Types.hs
Framework/Urls.hs
Framework/Wrapper.hs