1.1.14 (24/02/14)

• re-invent the ErrorApp without Rack::File and with support for 503(.html)
• when jruby.rack.error.app is set - make sure it's actually used (fixes #166)
• review Railtie for setting relative_url_root - do not override if already set
• support setting a "relative url root" even with plain rack applications for
  now needs to be explicitly configured with rack.relative_url_root_variable
• honor the set config.log_formatter when setting up logger in Rails
• when a header is added response should be considered handled (#153)
• support for returning managed applications from rack factory decorators
  using RackApplicationFactoryDecorator.getManagedApplications
• use .equals() rather than == since the level string is not always the same
  object instance as defined by the RackLogger interface
• support (building) rake gem on RubyGems 2.0 (removed Gem::Builder)
• rack 1.5.x support for 'our' servlet session store (with backwards-compat)