Including new demo sources and demo installation with Composer.
Fixing is404 undefined variable error.
Added phpunit config file, removed the composer demo installation.
Added another jpg file extension.
Merge branch 'master' into development

* master:
  Added another jpg file extension.
  Added phpunit config file, removed the composer demo installation.
  Fixing is404 undefined variable error.
  Including new demo sources and demo installation with Composer.
New development on the main caching class.