Application

  - Implemented a Images Controller with New/Delete Action
    - Image-Uploads are Supported and work properly
  - Added a new Sideboard Section: "Orte" for navigation
  - Some small Style tweaks

 Framework
  - Autoloader
    - Validation of Loading a Class now checks if a File exits and
      the Class Declaration is in it we wanted to load (Bugfix)
  - URL Helper
    - Redirects now set proper HTTP headers to prevent caching them